4. The joint probability distribution of X and Y is given in TABLE Q4 a. TABLE Q4 a 2 3 4 Y 1 0.04 0.14 0.23 0.07 2 0.07 0.17 0.23 0.05 Find i) the marginal distributions of X and Y. ii) the mean and variance of X. iii) the mean and variance of Y.

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