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7.38. Suppose X and Y have the following joint probability mass function: 3+2i-i i, je {1,2,3} P(,)) = 45 elsewhere (a) Find E[X] and E[Y].

7.38. Suppose X and Y have the following joint probability mass function: 3+2i-i i, je {1,2,3} P(,)) = 45 elsewhere (a) Find E[X] and E[Y]. (b) Find Var(X) and Var(Y). (c) Find Cov(X, Y). (d) Find Corr(X, Y)

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