| 
                 
                    Closing price on 7/28/2021
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    7.00 | 
                 
                
                    | High | 
                    7.00 | 
                 
                
                    | Low | 
                    7.00 | 
                     
                
                    | Volume | 
                    10,900 | 
                                 
                
                    | Split-adjusted Price | 
                    5.68 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/28/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                5.68
             |                                 
            
                10,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2021
             | 
            
                -0.30 / -4.11%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.14
             |                     
            
                5.68
             |                                 
            
                1,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/26/2021
             | 
            
                +0.30 / +4.29%
             |             
            
                6.80
             |           
            
                7.30
             |               
            
                6.60
             |                           
            
                7.30
             | 
            
                7.14
             |                     
            
                5.92
             |                                 
            
                1,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/23/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                5.68
             |                                 
            
                900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/22/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                5.68
             |                                 
            
                1,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/21/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                5.68
             |                                 
            
                800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/20/2021
             | 
            
                -0.40 / -5.41%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                5.68
             |                                 
            
                7,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/19/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.40
             |           
            
                7.40
             |               
            
                7.40
             |                           
            
                7.40
             | 
            
                7.40
             |                     
            
                6.00
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/16/2021
             | 
            
                +0.40 / +5.71%
             |             
            
                7.00
             |           
            
                7.40
             |               
            
                7.00
             |                           
            
                7.40
             | 
            
                7.40
             |                     
            
                6.00
             |                                 
            
                800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/15/2021
             | 
            
                -0.30 / -4.11%
             |             
            
                7.00
             |           
            
                7.10
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.06
             |                     
            
                5.68
             |                                 
            
                1,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/14/2021
             | 
            
                +0.40 / +5.80%
             |             
            
                7.00
             |           
            
                7.30
             |               
            
                6.90
             |                           
            
                7.30
             | 
            
                6.97
             |                     
            
                5.92
             |                                 
            
                8,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/13/2021
             | 
            
                0.00 / 0.00%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                6.90
             |                     
            
                5.60
             |                                 
            
                1,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/12/2021
             | 
            
                -0.60 / -8.00%
             |             
            
                7.40
             |           
            
                7.40
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                7.26
             |                     
            
                5.60
             |                                 
            
                10,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/9/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.50
             |           
            
                7.50
             |               
            
                7.50
             |                           
            
                7.50
             | 
            
                7.50
             |                     
            
                6.08
             |                                 
            
                2,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/8/2021
             | 
            
                +0.10 / +1.35%
             |             
            
                7.40
             |           
            
                7.50
             |               
            
                7.40
             |                           
            
                7.50
             | 
            
                7.46
             |                     
            
                6.08
             |                                 
            
                6,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/7/2021
             | 
            
                -0.10 / -1.33%
             |             
            
                7.30
             |           
            
                7.40
             |               
            
                7.20
             |                           
            
                7.40
             | 
            
                7.23
             |                     
            
                6.00
             |                                 
            
                13,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/6/2021
             | 
            
                +0.10 / +1.35%
             |             
            
                7.40
             |           
            
                7.50
             |               
            
                7.40
             |                           
            
                7.50
             | 
            
                7.50
             |                     
            
                6.08
             |                                 
            
                2,100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/5/2021
             | 
            
                -0.10 / -1.33%
             |             
            
                7.60
             |           
            
                7.60
             |               
            
                7.40
             |                           
            
                7.40
             | 
            
                7.40
             |                     
            
                6.00
             |                                 
            
                5,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/2/2021
             | 
            
                -0.10 / -1.32%
             |             
            
                7.60
             |           
            
                7.60
             |               
            
                7.50
             |                           
            
                7.50
             | 
            
                7.55
             |                     
            
                6.08
             |                                 
            
                18,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/1/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.60
             |           
            
                7.60
             |               
            
                7.50
             |                           
            
                7.60
             | 
            
                7.50
             |                     
            
                6.16
             |                                 
            
                13,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/30/2021
             | 
            
                -0.10 / -1.30%
             |             
            
                7.60
             |           
            
                7.70
             |               
            
                7.50
             |                           
            
                7.60
             | 
            
                7.61
             |                     
            
                6.16
             |                                 
            
                15,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/29/2021
             | 
            
                -0.10 / -1.28%
             |             
            
                7.80
             |           
            
                7.80
             |               
            
                7.60
             |                           
            
                7.70
             | 
            
                7.65
             |                     
            
                6.24
             |                                 
            
                5,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/28/2021
             | 
            
                -0.10 / -1.27%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.70
             |                           
            
                7.80
             | 
            
                7.78
             |                     
            
                6.33
             |                                 
            
                7,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/25/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.60
             |           
            
                7.90
             |               
            
                7.50
             |                           
            
                7.90
             | 
            
                7.50
             |                     
            
                6.41
             |                                 
            
                5,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/24/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.60
             |                           
            
                7.90
             | 
            
                7.63
             |                     
            
                6.41
             |                                 
            
                16,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/23/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                8.00
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                6.41
             |                                 
            
                6,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/22/2021
             | 
            
                +0.10 / +1.28%
             |             
            
                7.80
             |           
            
                7.90
             |               
            
                7.50
             |                           
            
                7.90
             | 
            
                7.74
             |                     
            
                6.41
             |                                 
            
                24,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.80
             |           
            
                7.80
             |               
            
                7.80
             |                           
            
                7.80
             | 
            
                7.80
             |                     
            
                6.33
             |                                 
            
                6,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/18/2021
             | 
            
                0.00 / 0.00%
             |             
            
                7.80
             |           
            
                7.80
             |               
            
                7.80
             |                           
            
                7.80
             | 
            
                7.80
             |                     
            
                6.33
             |                                 
            
                5,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/17/2021
             | 
            
                -0.10 / -1.27%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.60
             |                           
            
                7.80
             | 
            
                7.66
             |                     
            
                6.33
             |                                 
            
                14,500
             |  
            
                 
             |                                                              
             
    
         
    
    
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