(d)(5 marks) Let Bo and B be the Least Squares estimates of Bo and B1, respectively. Suppose that we scale the predictor z with a factor c> 0 (i.e., we now use cr as the predictor variable instead of z). With this modified predictor cz, the resulting Least Squares estimates are Bo=aoo and B = a11. Find the values ao and a. Also, explain how the scaling affects the goodness-of-fit of the regression model. Show your work.