Discrete random variables X and Y and there joint PMF were given as such below x-1 PX. Y(X, y) 2 ) ( 2x ) 0.4 + 3 0.63 x - y - 3 if x = 3, 4, . . . and y = 0, 1, . .. , 2x, and Px.Y(x, y) = 0 otherwise. A) Identify the distributions after solving for the marginal PMF of the variable X B) If Y given X, try solving for the conditional PMF while also identifying its distributions like in part A