Suppose that Yt follows the stationary AR (1) model Y₁ = 2.5 +0.7Y₁-1 + t, where & is i.i.d. with E(&t) = 0 and Var(t) = 9. a) Compute the mean and variance of Y b) Compute the first two autocovariances of Yt c) Compute the first two autocorrelations of Y d) Suppose that YT = 102.3. Compute YT+1\T Yr+1r = E(Yr+1|Yr,Yr-1,…)