Suppose we have a frequency function for two variables X and Y, f(x.V) = for x = 0, 1, 2 and 30 y = 0, 1, 2, 3. a. Determine the marginal distributions of X and Y. b. Determine E(X) and E()). c. Determine E(X + Y). d. If Z = 2X + 10, determine E(Z). e. Determine E(XY). f. Determine cov(X, Y). g. Are X and Y independent? Justify your