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Problem 6 Let X (a) Show that for u > A. (b) Find E(X2) and E(X4). Use them to find Var(X2). Problem 7 Let

Problem 6 Let X (a) Show that for u > A. (b) Find E(X2) and E(X4). Use them to find Var(X2). Problem 7 Let X, Y have the joint pdf 6 7 (a) (b) (c) Find cov(X, Y). Find a constant a such that Cov(X + Y, X + O. Let S = v"X, T = VV. Find the joint pdf for (S, T) and use it to compute Cov(S, T).

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