Problem #2 . Two scores, X and Y, are recorded for each of n=4 subjects. For these scores, find the value of each expression. 1. EX = 2. EY = 3. = AXZ Subject X Y 4. EXEY = 4 5. E(X - 1)(Y - 1) = A 6 6. (EX - 1)(ZY - 1) = B O 10 C CO 8 D