Question: Hi, So X1 and X2 are two random variables that are jointly distributed so that E(X1) = 12, E(X2) = 7, Var(X1) =4, Var(X2)=2 and

Hi,

So X1 and X2 are two random variables that are jointly distributed so that E(X1) = 12, E(X2) = 7, Var(X1) =4, Var(X2)=2 and Cov(X1,X2)= -2.

z= -5X1 - 3X2 + 1

Compute E(Z).

Compute Var (Z)

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