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                    Closing price on 5/18/2021
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                    | Open | 3.60 |  
                    | High | 3.60 |  
                    | Low | 3.40 |  
                    | Volume | 60,000 |  
                    | Split-adjusted Price | 3.50 |  
                
             | 
 |  SDD Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/18/2021 | +0.10 / +2.94% | 3.60 | 3.60 | 3.40 | 3.50 | 3.53 | 3.50 | 60,000 |   |  
            | 5/17/2021 | 0.00 / 0.00% | 3.70 | 3.70 | 3.40 | 3.50 | 3.41 | 3.50 | 45,100 |   |  			
            | 5/14/2021 | 0.00 / 0.00% | 3.50 | 3.60 | 3.40 | 3.60 | 3.46 | 3.60 | 34,700 |   |  
            | 5/13/2021 | -0.30 / -7.89% | 3.70 | 3.70 | 3.50 | 3.50 | 3.56 | 3.50 | 62,700 |   |  			
            | 5/12/2021 | +0.40 / +11.76% | 3.50 | 3.80 | 3.50 | 3.80 | 3.75 | 3.80 | 58,000 |   |  
            | 5/11/2021 | +0.40 / +12.90% | 3.30 | 3.50 | 3.30 | 3.50 | 3.45 | 3.50 | 54,900 |   |  			
            | 5/10/2021 | -0.20 / -5.88% | 3.30 | 3.30 | 3.00 | 3.20 | 3.14 | 3.20 | 108,300 |   |  
            | 5/7/2021 | -0.40 / -10.81% | 3.60 | 3.70 | 3.20 | 3.30 | 3.38 | 3.30 | 155,700 |   |  			
            | 5/6/2021 | -0.10 / -2.70% | 3.80 | 3.80 | 3.60 | 3.60 | 3.70 | 3.60 | 21,000 |   |  
            | 5/5/2021 | +0.10 / +2.70% | 3.70 | 3.80 | 3.60 | 3.80 | 3.67 | 3.80 | 52,400 |   |  			
            | 5/4/2021 | -0.50 / -12.50% | 3.80 | 3.90 | 3.50 | 3.50 | 3.66 | 3.50 | 51,200 |   |  
            | 4/29/2021 | -0.10 / -2.50% | 4.30 | 4.30 | 3.90 | 3.90 | 4.02 | 3.90 | 37,800 |   |  			
            | 4/28/2021 | +0.50 / +14.29% | 3.50 | 4.00 | 3.50 | 4.00 | 3.95 | 4.00 | 121,800 |   |  
            | 4/27/2021 | -0.10 / -2.63% | 3.70 | 3.90 | 3.50 | 3.70 | 3.54 | 3.70 | 191,900 |   |  			
            | 4/26/2021 | 0.00 / 0.00% | 3.80 | 3.90 | 3.70 | 3.70 | 3.79 | 3.70 | 60,500 |   |  
            | 4/23/2021 | -0.20 / -5.00% | 4.00 | 4.00 | 3.60 | 3.80 | 3.68 | 3.80 | 227,200 |   |  			
            | 4/22/2021 | -0.50 / -11.63% | 4.30 | 4.30 | 3.70 | 3.80 | 3.96 | 3.80 | 158,000 |   |  
            | 4/20/2021 | +0.10 / +2.38% | 4.40 | 4.50 | 4.20 | 4.30 | 4.34 | 4.30 | 216,800 |   |  			
            | 4/19/2021 | -0.10 / -2.17% | 4.60 | 4.60 | 4.00 | 4.50 | 4.16 | 4.50 | 351,000 |   |  
            | 4/16/2021 | -0.70 / -13.46% | 5.00 | 5.00 | 4.50 | 4.50 | 4.61 | 4.50 | 338,800 |   |  			
            | 4/15/2021 | -0.20 / -3.85% | 5.20 | 5.50 | 4.80 | 5.00 | 5.18 | 5.00 | 651,400 |   |  
            | 4/14/2021 | -0.30 / -5.66% | 5.10 | 5.40 | 4.80 | 5.00 | 5.15 | 5.00 | 630,600 |   |  			
            | 4/13/2021 | -0.20 / -3.77% | 5.30 | 5.60 | 5.00 | 5.10 | 5.27 | 5.10 | 1,138,800 |   |  
            | 4/12/2021 | +0.40 / +8.16% | 4.70 | 5.40 | 4.70 | 5.30 | 5.27 | 5.30 | 706,300 |   |  			
            | 4/9/2021 | +0.50 / +10.87% | 4.60 | 5.20 | 4.40 | 5.10 | 4.92 | 5.10 | 614,400 |   |  
            | 4/8/2021 | -0.50 / -9.62% | 5.20 | 5.20 | 4.50 | 4.70 | 4.64 | 4.70 | 468,600 |   |  			
            | 4/7/2021 | -0.10 / -1.89% | 5.30 | 5.90 | 4.60 | 5.20 | 5.17 | 5.20 | 1,027,800 |   |  
            | 4/6/2021 | +0.70 / +14.89% | 5.20 | 5.40 | 5.10 | 5.40 | 5.33 | 5.40 | 830,700 |   |  			
            | 4/5/2021 | +0.60 / +14.63% | 4.60 | 4.70 | 4.40 | 4.70 | 4.65 | 4.70 | 581,000 |   |  
            | 4/2/2021 | +0.50 / +13.16% | 3.80 | 4.30 | 3.80 | 4.30 | 4.11 | 4.30 | 761,900 |   |  |