The joint pmf of X and Y (discrete RV's) is given by: p(x,y) Y=1 Y=2 Y=3 X=1 1/9 1/3 1/9 X=2 1/9 0 1/18 X=3 0 1/6 1/9 a) Compute E[XIY=1] for i = 1,2,3. b) Are Xand Y independent? Question 10: (Text 3.68) Consider the following joint probability density function of X and Y: (3x-y 1 2}