Question: If (X_{1}) has mean 1 and variance 3 while (X_{2}) has mean -2 and variance 5 , and the two are independent, find (a) (Eleft(X_{1}+2

If \(X_{1}\) has mean 1 and variance 3 while \(X_{2}\) has mean -2 and variance 5 , and the two are independent, find

(a) \(E\left(X_{1}+2 X_{2}-3\right)\)

(b) \(\operatorname{Var}\left(X_{1}+2 X_{2}-3\right)\).

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