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                    Closing price on 5/24/2021
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        |           
                
                    | Open | 2.40 |  
                    | High | 2.50 |  
                    | Low | 2.30 |  
                    | Volume | 259,100 |  
                    | Split-adjusted Price | 2.30 |  
                
             | 
 |  SDP Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/24/2021 | -0.20 / -8.00% | 2.40 | 2.50 | 2.30 | 2.30 | 2.30 | 2.30 | 259,100 |   |  
            | 5/21/2021 | +0.10 / +4.17% | 2.40 | 2.60 | 2.40 | 2.50 | 2.50 | 2.50 | 40,900 |   |  			
            | 5/20/2021 | -0.30 / -11.11% | 2.50 | 2.60 | 2.40 | 2.40 | 2.40 | 2.40 | 56,900 |   |  
            | 5/19/2021 | 0.00 / 0.00% | 2.70 | 2.80 | 2.60 | 2.60 | 2.65 | 2.60 | 180,200 |   |  			
            | 5/18/2021 | +0.30 / +13.04% | 2.40 | 2.60 | 2.40 | 2.60 | 2.57 | 2.60 | 207,500 |   |  
            | 5/17/2021 | +0.20 / +9.09% | 2.20 | 2.40 | 2.10 | 2.40 | 2.33 | 2.40 | 38,700 |   |  			
            | 5/14/2021 | -0.10 / -4.17% | 2.30 | 2.30 | 2.10 | 2.30 | 2.23 | 2.30 | 165,200 |   |  
            | 5/13/2021 | 0.00 / 0.00% | 2.40 | 2.50 | 2.30 | 2.40 | 2.38 | 2.40 | 30,900 |   |  			
            | 5/12/2021 | 0.00 / 0.00% | 2.40 | 2.50 | 2.30 | 2.40 | 2.42 | 2.40 | 46,700 |   |  
            | 5/11/2021 | +0.20 / +8.70% | 2.30 | 2.50 | 2.20 | 2.50 | 2.39 | 2.50 | 63,100 |   |  			
            | 5/10/2021 | 0.00 / 0.00% | 2.30 | 2.40 | 2.20 | 2.30 | 2.30 | 2.30 | 74,800 |   |  
            | 5/7/2021 | -0.20 / -8.00% | 2.50 | 2.60 | 2.30 | 2.30 | 2.35 | 2.30 | 101,700 |   |  			
            | 5/6/2021 | -0.20 / -7.41% | 2.70 | 2.70 | 2.40 | 2.50 | 2.49 | 2.50 | 255,800 |   |  
            | 5/5/2021 | 0.00 / 0.00% | 2.60 | 2.80 | 2.50 | 2.60 | 2.67 | 2.60 | 99,100 |   |  			
            | 5/4/2021 | -0.10 / -3.70% | 2.50 | 2.70 | 2.50 | 2.60 | 2.60 | 2.60 | 16,600 |   |  
            | 4/29/2021 | +0.20 / +7.69% | 2.80 | 2.80 | 2.70 | 2.80 | 2.73 | 2.80 | 42,200 |   |  			
            | 4/28/2021 | +0.30 / +12.50% | 2.40 | 2.70 | 2.30 | 2.70 | 2.56 | 2.70 | 407,900 |   |  
            | 4/27/2021 | -0.40 / -14.29% | 2.80 | 2.80 | 2.40 | 2.40 | 2.44 | 2.40 | 146,900 |   |  			
            | 4/26/2021 | 0.00 / 0.00% | 2.70 | 3.00 | 2.60 | 2.70 | 2.81 | 2.70 | 51,800 |   |  
            | 4/23/2021 | -0.30 / -10.00% | 2.90 | 2.90 | 2.60 | 2.70 | 2.65 | 2.70 | 125,900 |   |  			
            | 4/22/2021 | +0.20 / +6.90% | 3.20 | 3.20 | 2.90 | 3.10 | 2.96 | 3.10 | 66,000 |   |  
            | 4/20/2021 | -0.40 / -11.76% | 3.30 | 3.30 | 2.90 | 3.00 | 2.95 | 3.00 | 306,400 |   |  			
            | 4/19/2021 | -0.50 / -12.82% | 3.40 | 3.40 | 3.40 | 3.40 | 3.40 | 3.40 | 126,600 |   |  
            | 4/16/2021 | -0.10 / -2.44% | 4.20 | 4.20 | 3.60 | 4.00 | 3.89 | 4.00 | 64,500 |   |  			
            | 4/15/2021 | +0.50 / +13.51% | 3.70 | 4.20 | 3.70 | 4.20 | 4.07 | 4.20 | 436,600 |   |  
            | 4/14/2021 | -0.20 / -5.00% | 4.00 | 4.00 | 3.60 | 3.80 | 3.74 | 3.80 | 144,000 |   |  			
            | 4/13/2021 | +0.30 / +8.11% | 4.20 | 4.20 | 3.70 | 4.00 | 4.03 | 4.00 | 331,600 |   |  
            | 4/12/2021 | +0.40 / +12.12% | 3.30 | 3.70 | 3.30 | 3.70 | 3.66 | 3.70 | 227,900 |   |  			
            | 4/9/2021 | +0.20 / +6.25% | 3.00 | 3.40 | 3.00 | 3.40 | 3.31 | 3.40 | 73,000 |   |  
            | 4/8/2021 | +0.20 / +6.45% | 3.50 | 3.50 | 2.70 | 3.30 | 3.21 | 3.30 | 190,900 |   |  |