(d) [4 marks] Let 6-7-Biz and 31 =" are the least-squares estimates of So and B1, respectively. Prove that EL,(9 -9:)=0. (e) For variables r and y, let y* = 2y and r* = 2r, +5, i=1,...,n. Now consider the two simple linear regression models, Model A:Y, =Bo+ Bin, te, and Model B: Y =8; + Six; te, and, let ; and Ar be the least squares estimates for the data y,,r, i=1,...,n. i. [1 mark] How are I*, y" related to I, y? ii. [1 mark] How are s,, sy related to $,, $,? iii. [2 marks] How are 85, 8; related to So, A? iv. [1 mark] How are SS(Res) for Model A related to SS(Res) for Model B? v. [1 mark] How are R" for Model A related to R for Model B