Suppose that X, Y, and Z are jointly distributed random variables, that is, they are defined on the same sample space. Suppose that we also have the following. E(X)=3 E(Y)=9 E(Z)=-8 Var(X)=23 Var(Y)=35 Var(Z)=37 Compute the values of the expressions below. E(4Y4)= 32 (-2Y+ZZ) 2 E = 5 5 Var(-1 32) = 333] 13(222): 128