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Question: q4 suppose x is a random variables with possible values...

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Q4. Suppose X is a random variables with possible values -1,1 and Y is another with possible values -1, 0,1. Suppose the joint probability distribution of X, Y, f(x, y), is given by: a. Find the marginal distribution of X and Y. b. Find E[Xly1] c. Compute Cov(X, Y) d. Are X, Y independent? justify e. Compute E(XYorl

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