Question: If (X_{1}) has mean 8 and variance 2 while (X_{2}) has mean -12.5 and variance 2.25 , and the two are independent, find (a) (Eleft(X_{1}-X_{2}

If \(X_{1}\) has mean 8 and variance 2 while \(X_{2}\) has mean -12.5 and variance 2.25 , and the two are independent, find

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

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

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