following questions: a. Consider the simple regression model y, = Bo + Bit, + ci. Using this model we compute the residuals e,, i = 1,....n. Find the estimators of the intercept and slope of the regression of e, on It. b. From the regression of lead (y) on zinc (r) using n observations we found: )(yi - y)? = 252847.8, R2 = 0.9413, B1 = 0.228026, 82 = 390.5842, _ 1; = 19375. Suppose 16 = 281. Find its leverage value