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            | 
                    Closing price on 11/30/2020
                 |  |  
    
        |           
                
                    | Open | 8.50 |  
                    | High | 9.90 |  
                    | Low | 8.20 |  
                    | Volume | 6,400 |  
                    | Split-adjusted Price | 8.03 |  
                
             | 
 |  NST Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 11/30/2020 | +0.80 / +8.79% | 8.50 | 9.90 | 8.20 | 9.90 | 8.84 | 8.03 | 6,400 |   |  
            | 11/27/2020 | 0.00 / 0.00% | 8.90 | 9.10 | 8.20 | 9.10 | 8.37 | 7.38 | 35,900 |   |  			
            | 11/26/2020 | +0.80 / +9.64% | 7.60 | 9.10 | 7.50 | 9.10 | 7.55 | 7.38 | 171,000 |   |  
            | 11/25/2020 | 0.00 / 0.00% | 8.30 | 8.30 | 8.30 | 8.30 | 8.30 | 6.73 | 0 |   |  			
            | 11/24/2020 | 0.00 / 0.00% | 8.30 | 8.30 | 8.30 | 8.30 | 8.30 | 6.73 | 0 |   |  
            | 11/23/2020 | +0.30 / +3.75% | 8.30 | 8.30 | 8.30 | 8.30 | 8.30 | 6.73 | 100 |   |  			
            | 11/20/2020 | 0.00 / 0.00% | 7.90 | 8.00 | 7.90 | 8.00 | 7.95 | 6.49 | 200 |   |  
            | 11/19/2020 | 0.00 / 0.00% | 8.00 | 8.00 | 8.00 | 8.00 | 8.00 | 6.49 | 0 |   |  			
            | 11/18/2020 | +0.30 / +3.90% | 7.60 | 8.00 | 7.60 | 8.00 | 7.70 | 6.49 | 400 |   |  
            | 11/17/2020 | 0.00 / 0.00% | 7.70 | 7.70 | 7.70 | 7.70 | 7.70 | 6.24 | 0 |   |  			
            | 11/16/2020 | 0.00 / 0.00% | 7.70 | 7.70 | 7.70 | 7.70 | 7.70 | 6.24 | 0 |   |  
            | 11/13/2020 | +0.40 / +5.48% | 7.70 | 7.70 | 7.70 | 7.70 | 7.70 | 6.24 | 100 |   |  			
            | 11/12/2020 | -0.80 / -9.88% | 7.50 | 7.50 | 7.30 | 7.30 | 7.33 | 5.92 | 14,500 |   |  
            | 11/11/2020 | 0.00 / 0.00% | 8.10 | 8.10 | 8.10 | 8.10 | 8.10 | 6.57 | 0 |   |  			
            | 11/10/2020 | 0.00 / 0.00% | 8.10 | 8.10 | 8.10 | 8.10 | 8.10 | 6.57 | 5,000 |   |  
            | 11/9/2020 | -0.90 / -10.00% | 8.90 | 9.30 | 8.10 | 8.10 | 8.28 | 6.57 | 9,500 |   |  			
            | 11/6/2020 | 0.00 / 0.00% | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 7.30 | 0 |   |  
            | 11/5/2020 | +0.20 / +2.27% | 9.20 | 9.20 | 8.10 | 9.00 | 8.39 | 7.30 | 700 |   |  			
            | 11/4/2020 | +0.50 / +6.02% | 9.00 | 9.00 | 8.80 | 8.80 | 8.90 | 7.14 | 200 |   |  
            | 11/3/2020 | -0.80 / -8.79% | 9.20 | 9.40 | 8.30 | 8.30 | 8.48 | 6.73 | 1,600 |   |  			
            | 11/2/2020 | +0.30 / +3.41% | 9.00 | 9.10 | 9.00 | 9.10 | 9.08 | 7.38 | 500 |   |  
            | 10/30/2020 | +0.50 / +6.02% | 8.30 | 9.00 | 8.30 | 8.80 | 8.72 | 7.14 | 9,900 |   |  			
            | 10/29/2020 | 0.00 / 0.00% | 8.30 | 8.30 | 8.30 | 8.30 | 8.30 | 6.73 | 0 |   |  
            | 10/28/2020 | +0.30 / +3.75% | 8.30 | 8.30 | 8.30 | 8.30 | 8.30 | 6.73 | 100 |   |  			
            | 10/27/2020 | +0.20 / +2.56% | 8.00 | 8.00 | 8.00 | 8.00 | 8.00 | 6.49 | 100 |   |  
            | 10/26/2020 | -0.80 / -9.30% | 8.00 | 8.00 | 7.80 | 7.80 | 7.84 | 6.33 | 1,800 |   |  			
            | 10/23/2020 | +0.60 / +7.50% | 8.00 | 8.60 | 8.00 | 8.60 | 8.10 | 6.97 | 1,100 |   |  
            | 10/22/2020 | 0.00 / 0.00% | 8.00 | 8.00 | 8.00 | 8.00 | 8.00 | 6.49 | 0 |   |  			
            | 10/21/2020 | 0.00 / 0.00% | 8.00 | 8.00 | 8.00 | 8.00 | 8.00 | 6.49 | 0 |   |  
            | 10/20/2020 | +0.30 / +3.90% | 7.70 | 8.00 | 7.70 | 8.00 | 7.71 | 6.49 | 2,500 |   |  |