Answer please

1. Consider the simple linear regression model y = Bot Bixtu. In the lectures, I proposed the following alternative estimator of $1, B 1 = 1 n (yi - y) (0.1) n i=1 Ci - XC) (a) Show that 31 can be rewritten as B1 = Zi=1 (zi - z) yi H EL-1 ( zi - Z) xi' Zi = (0.2) Use this expression to show that S, is an unbiased estimator of B, under SLR.1- SLR.4