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If X and Y have the joint probability distribution f(-1,0) = 0, f(-1, 1) = 4, -, f(0,0) = 6, f(0, 1) = 0, f(1,0)

If X and Y have the joint probability distribution f(-1,0) = 0, f(-1, 1) = 4, -, f(0,0) = 6, f(0, 1) = 0, f(1,0) = , and f (1, 1) = 5, show that (a) cov(X, Y) = 0; (b) the two random variables are not independent

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