Question 3 (a) Let X1, 202, . . . , In ~Gamma(a, B) where S is known. Show that En_In(xi) is sufficient for a. (b) Let 21, 22, . .. , an iid ~Xx. Show that En_1 In(xi) is sufficient for k. (c) Let 21, 22, iid N(u, 02) where u is known. Show that En_1(Xi - M) is sufficient for o2