| 
                 
                    Closing price on 5/11/2023
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    2.90 | 
                 
                
                    | High | 
                    3.00 | 
                 
                
                    | Low | 
                    2.90 | 
                     
                
                    | Volume | 
                    5,700 | 
                                 
                
                    | Split-adjusted Price | 
                    3.00 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD6 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/11/2023
             | 
            
                +0.10 / +3.45%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.99
             |                     
            
                3.00
             |                                 
            
                5,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                2.90
             | 
            
                2.96
             |                     
            
                2.90
             |                                 
            
                7,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2023
             | 
            
                -0.10 / -3.33%
             |             
            
                2.80
             |           
            
                3.00
             |               
            
                2.80
             |                           
            
                2.90
             | 
            
                2.90
             |                     
            
                2.90
             |                                 
            
                19,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.91
             |                     
            
                3.00
             |                                 
            
                2,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2023
             | 
            
                +0.10 / +3.45%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.91
             |                     
            
                3.00
             |                                 
            
                5,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2023
             | 
            
                -0.10 / -3.33%
             |             
            
                2.80
             |           
            
                3.00
             |               
            
                2.80
             |                           
            
                2.90
             | 
            
                2.87
             |                     
            
                2.90
             |                                 
            
                2,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/28/2023
             | 
            
                +0.10 / +3.45%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.90
             |                     
            
                3.00
             |                                 
            
                3,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2023
             | 
            
                -0.10 / -3.33%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                2.90
             | 
            
                2.92
             |                     
            
                2.90
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2023
             | 
            
                +0.10 / +3.45%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.96
             |                     
            
                3.00
             |                                 
            
                17,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.80
             |           
            
                2.90
             |               
            
                2.80
             |                           
            
                2.90
             | 
            
                2.80
             |                     
            
                2.90
             |                                 
            
                9,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2023
             | 
            
                -0.10 / -3.33%
             |             
            
                3.00
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                2.90
             | 
            
                2.95
             |                     
            
                2.90
             |                                 
            
                1,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2023
             | 
            
                +0.10 / +3.45%
             |             
            
                3.00
             |           
            
                3.00
             |               
            
                3.00
             |                           
            
                3.00
             | 
            
                3.00
             |                     
            
                3.00
             |                                 
            
                2,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2023
             | 
            
                -0.10 / -3.33%
             |             
            
                2.90
             |           
            
                2.90
             |               
            
                2.80
             |                           
            
                2.90
             | 
            
                2.83
             |                     
            
                2.90
             |                                 
            
                4,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.91
             |                     
            
                3.00
             |                                 
            
                2,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.93
             |                     
            
                3.00
             |                                 
            
                700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.90
             |                     
            
                3.00
             |                                 
            
                6,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2023
             | 
            
                +0.10 / +3.45%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.91
             |                     
            
                3.00
             |                                 
            
                16,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2023
             | 
            
                -0.10 / -3.33%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.80
             |                           
            
                2.90
             | 
            
                2.89
             |                     
            
                2.90
             |                                 
            
                10,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2023
             | 
            
                +0.10 / +3.45%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.92
             |                     
            
                3.00
             |                                 
            
                6,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2023
             | 
            
                -0.10 / -3.33%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                2.90
             | 
            
                2.90
             |                     
            
                2.90
             |                                 
            
                5,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.92
             |                     
            
                3.00
             |                                 
            
                4,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2023
             | 
            
                0.00 / 0.00%
             |             
            
                3.00
             |           
            
                3.00
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.91
             |                     
            
                3.00
             |                                 
            
                3,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2023
             | 
            
                0.00 / 0.00%
             |             
            
                3.00
             |           
            
                3.10
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                3.00
             |                     
            
                3.00
             |                                 
            
                16,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2023
             | 
            
                +0.10 / +3.45%
             |             
            
                2.90
             |           
            
                3.00
             |               
            
                2.80
             |                           
            
                3.00
             | 
            
                2.91
             |                     
            
                3.00
             |                                 
            
                22,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.80
             |           
            
                2.90
             |               
            
                2.80
             |                           
            
                2.90
             | 
            
                2.86
             |                     
            
                2.90
             |                                 
            
                9,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.90
             |           
            
                2.90
             |               
            
                2.80
             |                           
            
                2.90
             | 
            
                2.82
             |                     
            
                2.90
             |                                 
            
                10,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.80
             |           
            
                2.90
             |               
            
                2.80
             |                           
            
                2.90
             | 
            
                2.83
             |                     
            
                2.90
             |                                 
            
                1,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.80
             |           
            
                2.90
             |               
            
                2.80
             |                           
            
                2.90
             | 
            
                2.81
             |                     
            
                2.90
             |                                 
            
                5,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2023
             | 
            
                0.00 / 0.00%
             |             
            
                2.80
             |           
            
                2.90
             |               
            
                2.80
             |                           
            
                2.90
             | 
            
                2.88
             |                     
            
                2.90
             |                                 
            
                600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2023
             | 
            
                +0.10 / +3.57%
             |             
            
                2.90
             |           
            
                2.90
             |               
            
                2.90
             |                           
            
                2.90
             | 
            
                2.90
             |                     
            
                2.90
             |                                 
            
                2,500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |