8.1 Using the identity (9 6) = [e7 13(9)] + [1309) 6] = [r9 13(9)] + 309'), show that MSE(9) = E[(9 6f] = W9) + (3(9))? 8.2 a If 5' is an unbiased estimator for 6, what is B()? b If 3(6) = 5, what is 15(9)