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)= 5 E(Y)=-2 Var(X) = 44 Var(Y)= 23 Var(Z)= 32 E(Z)=-4 Compute the values of the expressions below. E(-5+5Y) = | 3Y+5X E %3D -3 Var(5X-5) = I E(-2r') = I olo

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