And derive cov(x1,x2) var(x)

(D) Derive val ( A ). 2. Now suppose X = ( X1 + X2 ) / 2, where X1 and X2 are independent and P (X; = 1 ) = p, and P(X; =0 ) =1 -p where i can be 1 or 2. (a) Derive E( X )