2. (5) Determine whether or not the following statements are true or false. If they are always true write TRUE. If they are not always true, write FALSE. (a) If data matrix D is a 5 x 6 matrix, then there are multiple solutions to 5 argmin.ER n=1 (b) Let X be a random vector in Rd and let T be a random variable. Suppose that the training set {(In, ,)}A-o consists of independently drawn versions of (XT) and that f and g are two different predictors that are learned from the training set. If f(x) = t, for all 1 Sns N, then Ef(Y -f(x)) 0, then the solution to the Ridge Regression problem is unique. (a) Forward Stepwise Selection finds a solution to the Best k-Subset Selection problem. (e) Consider the training set {(*n, tn)} -,. Let w = argminwertn-?w subject to the N constraint (wli s 1 and let wz = argmine (tm w)? subject to the constraint |