10 pts Essay Question: You recall from one of your earlier lectures in macroeconomics that the per capita income depends on the savings rate of the country: those who save more end up with a higher standard of living. To test this theory, you collect data from the Penn World, Tables on GDP per worker relative to the United States (RelProd) and the average investment share of GDP (SK) from 1970-1990. The regression results using homoskedasticity-only standard errors are the following: RelProd - -0.08 + 2.44SK, R2 - 0.46, SER = 0.21 (0.04) (0.26) (a) Calculate the t-statistics of the slope coefficient. (b) If the regression error term turns out to be heteroskedastic, is the regression above still correct? If not, what is the solution