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5. Let X and Y be random variables with joint moment generating function Myy (s, t) = 0.15es+ + 0.20es+2t + 0.35e3s+t + 0.30e3s+2t a.

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5. Let X and Y be random variables with joint moment generating function Myy (s, t) = 0.15es+ + 0.20es+2t + 0.35e3s+t + 0.30e3s+2t a. Find the Mu(t) for U = 5X - 4Y. b. Find the Mzw (s, t) for Z = 2X + Y and W = X - 3Y c. Find E [X], E[Y] and E [XY] by differentiation. d. Find E [X], E[Y] and E [XY] by restoring the joint pmf of X and Y. e. Find Cov(X, Y)

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