Supgose that (y1,:r1), . . . , (ya, I\") is a dstaset to which we t a. simple linear regression. Let u and ,61 be the least squares estimates of the intercept and slope, and let 8; be the residual. Show that: (a) g = 0, (b) 31 = Ziyi: Where cf = S_-2 to) 03m) =50, (d) Codes. ls) = sif