Let the joint pmf f(x, y) of X and Y be given by the following:
(x, y) f(x, y)
(1, 1) ....... 3/8
(2, 1) ....... 1/8
(1, 2) ....... 1/8
(2, 2) ....... 3/8
Find the two conditional probability mass functions and the corresponding means and variances.