First screen shot is the equations. Help me with questions 3 and 4 on the second screenshot please

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 ). (b) Derive var( X ).Question 3 I pis (Part A, question 2) - [Note the subscript 1] E(X1) is None of the above Op O 1 Oo O 1 -p D Question 4 1 pts (Part A, question 2a) When X = itx2, E(X) is O 0.5 O None of the above O E(X1) + E(X2) O 0.5 E(X1) + 0.5 E(X2) O E( X1) E( X 2)