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            | 
                    Closing price on 1/20/2022
                 |  |  
    
        |           
                
                    | Open | 9.10 |  
                    | High | 9.80 |  
                    | Low | 9.10 |  
                    | Volume | 4,600 |  
                    | Split-adjusted Price | 7.95 |  
                
             | 
 |  NST Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 1/20/2022 | +0.60 / +6.52% | 9.10 | 9.80 | 9.10 | 9.80 | 9.26 | 7.95 | 4,600 |   |  
            | 1/19/2022 | -1.00 / -9.80% | 9.30 | 9.50 | 9.20 | 9.20 | 9.23 | 7.46 | 111,100 |   |  			
            | 1/18/2022 | -0.10 / -0.97% | 10.30 | 10.30 | 9.50 | 10.20 | 9.65 | 8.27 | 10,000 |   |  
            | 1/17/2022 | 0.00 / 0.00% | 10.30 | 10.30 | 9.90 | 10.30 | 10.13 | 8.35 | 4,700 |   |  			
            | 1/14/2022 | -0.10 / -0.96% | 9.60 | 10.40 | 9.60 | 10.30 | 9.78 | 8.35 | 22,300 |   |  
            | 1/13/2022 | -0.30 / -2.80% | 10.60 | 10.80 | 10.40 | 10.40 | 10.63 | 8.43 | 9,600 |   |  			
            | 1/12/2022 | -0.10 / -0.93% | 10.80 | 10.90 | 10.50 | 10.70 | 10.78 | 8.68 | 63,700 |   |  
            | 1/11/2022 | +0.30 / +2.86% | 10.60 | 11.30 | 10.50 | 10.80 | 10.82 | 8.76 | 19,500 |   |  			
            | 1/10/2022 | 0.00 / 0.00% | 10.50 | 10.70 | 10.40 | 10.50 | 10.52 | 8.52 | 25,000 |   |  
            | 1/7/2022 | +0.20 / +1.94% | 10.40 | 10.50 | 10.30 | 10.50 | 10.42 | 8.52 | 16,800 |   |  			
            | 1/6/2022 | -0.10 / -0.96% | 10.40 | 10.60 | 10.20 | 10.30 | 10.37 | 8.35 | 37,800 |   |  
            | 1/5/2022 | -0.60 / -5.45% | 10.80 | 11.00 | 10.20 | 10.40 | 10.56 | 8.43 | 55,000 |   |  			
            | 1/4/2022 | +0.70 / +6.80% | 10.80 | 11.30 | 10.60 | 11.00 | 11.12 | 8.92 | 23,500 |   |  
            | 12/31/2021 | -1.10 / -9.65% | 11.50 | 11.80 | 10.30 | 10.30 | 10.98 | 8.35 | 94,700 |   |  			
            | 12/30/2021 | 0.00 / 0.00% | 11.10 | 11.90 | 11.00 | 11.40 | 11.28 | 9.25 | 65,800 |   |  
            | 12/29/2021 | -0.50 / -4.20% | 12.00 | 12.40 | 11.30 | 11.40 | 11.57 | 9.25 | 44,900 |   |  			
            | 12/28/2021 | +1.00 / +9.17% | 11.00 | 11.90 | 11.00 | 11.90 | 11.60 | 9.65 | 110,700 |   |  
            | 12/27/2021 | +0.60 / +5.83% | 10.50 | 11.30 | 10.50 | 10.90 | 10.83 | 8.84 | 66,600 |   |  			
            | 12/24/2021 | +0.40 / +4.04% | 9.90 | 10.70 | 9.90 | 10.30 | 10.14 | 8.35 | 69,300 |   |  
            | 12/23/2021 | +0.20 / +2.06% | 9.70 | 9.90 | 9.40 | 9.90 | 9.57 | 8.03 | 28,000 |   |  			
            | 12/22/2021 | +0.20 / +2.11% | 9.30 | 9.80 | 9.30 | 9.70 | 9.66 | 7.87 | 8,700 |   |  
            | 12/21/2021 | +0.10 / +1.06% | 9.20 | 9.90 | 9.20 | 9.50 | 9.62 | 7.70 | 39,000 |   |  			
            | 12/20/2021 | 0.00 / 0.00% | 9.40 | 9.50 | 9.30 | 9.40 | 9.33 | 7.62 | 15,000 |   |  
            | 12/17/2021 | -0.10 / -1.05% | 9.50 | 9.50 | 9.20 | 9.40 | 9.35 | 7.62 | 6,200 |   |  			
            | 12/16/2021 | +0.10 / +1.06% | 9.10 | 9.50 | 9.00 | 9.50 | 9.21 | 7.70 | 8,900 |   |  
            | 12/15/2021 | -0.10 / -1.05% | 9.20 | 9.50 | 9.20 | 9.40 | 9.38 | 7.62 | 22,500 |   |  			
            | 12/14/2021 | 0.00 / 0.00% | 9.50 | 9.60 | 9.10 | 9.50 | 9.34 | 7.70 | 24,400 |   |  
            | 12/13/2021 | +0.10 / +1.06% | 9.40 | 9.60 | 9.00 | 9.50 | 9.22 | 7.70 | 39,700 |   |  			
            | 12/10/2021 | +0.10 / +1.08% | 9.30 | 9.50 | 9.30 | 9.40 | 9.31 | 7.62 | 33,100 |   |  
            | 12/9/2021 | -0.30 / -3.13% | 9.60 | 9.60 | 9.30 | 9.30 | 9.39 | 7.54 | 27,900 |   |  |