Suppose that X, Y, and Z are jointly distributed random va Suppose that we also have the following. E ( X) = -6 E( Y) = -1 E(Z ) =-8 Var (x) =33 Var(Y ) -41 Var(Z ) = 8 Compute the values of the expressions below. E(-32 + 1) =0 Y+ 2X X E 5 Var ( 4Y + 1) = 1 E(-272) = 0