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(Y)=-6 E(Z) =7 Var (X) = 31 Var(Y) = 34...

Extracted text: 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(Y)=-6 E(Z) =7 Var (X) = 31 Var(Y) = 34 Var(Z)=5 E(X)=2 Compute the values of the expressions below. E(5-5Y)= 0 (")-0 %3D Var(3Y+5) = 0 E(-x') - 0