Suppose X and Y are jointly absolutely continuous, with f(x, y) = C 9(xy + x^5y^5)/ 16,000,900 0 x 4, 0 y 5 0 otherwise a. Find f(x) and f(y). b. Find E(x) and E(y). c. Find Var(x) and Var(y). d. Find E(x|y) and E(y|x). e. Find E(E(x|y)), and verify that. It is equal to E(x)