Based on a regression model that contains an intercept and a single explanatory variable, we computed the following where SSR is the sum of squared residuals: XX=[7222],(XX)1=[0.20.20.20.7],Xy=[2212],SSR=40 where =[0,1] is the vector of unknown population parameters, and ^=[^0,^1] is the vector of OLS estimators. Note: ^=(XX)1Xy What is the variance of the slope estimate