3) U = [1, 2, 3], V = [-1, -2, -4, -3], W = [2, 3, 0, -1]' and Z = [2; 4; 3; 3]' a) Using necessary commands, investigate the products of following cases U*(V+W), [U;V], V*[W- Z]', W*Z', U.*V, [W Z], U'*V b) Explain the concatenation matrix with the examples and check following matrices M1 = [U; V], M2 = [U V], M3 = [W'; V]