42 The following matrices were obtained as part of regression analysis. [17] 33 1 4 75 1 16 6 59 324 Y = X => X'X= X'Y= 28 13 59 835 4061 91 55 1 21 8 Assume the multiple linear regression Y=XB+ was used: a) Obtain the estimated regression function. b) Obtain the estimated variance-covariance matrix of vector .