Determine the exact expression for2(M)used in AIC/BIC computations for a standard linear model Recall that the OLS solution foris equivalent to the MLE solution for. You will need to derive the MLE of2.

a)Write the likelihood function of your data under the assumption that the errors are

independent with mean 0 and variance2.

b)Use calculus to solve for the MLE of2.

c)Using the MLE forand2, simplify 2(M).