6. Consider the formula for Var (B1) from a simple regression below. For the regression estimated in Part 1, what is the value of SSTx ? [7.5 marks] 02 Var 1 = SSTx 7. For the regression estimated in Part 1, what is the value of SSTy ? [7.5 marks]Source SS df MS Number of obs S 5 F (1, 3) = 3 . 62 Model 14. 2222222 1 14.2222222 Prob > F 0 . 1531 Residual 11. 7777778 3 3. 92592593 R-squared 0 . 5470 Adj R-squared = 0 . 3960 Total 26 4 6.5 Root MSE 1. 9814 Y Coefficient Std. err. t P> | t| [95% conf. interval] X . 8888889 . 4670193 1. 90 0 . 153 - . 5973749 2. 375153 _cons 2. 333333 1 . 657754 1. 41 0 . 254 -2. 94238 7 . 609046