2] Let fx.y(x, y) = c(x + y) be the joint probability function of X and Y for x = 1, 2, 3 and y = 1, 2, 3. Determine a c b) P(X = 1, Y 2) e) E(X) and E(X) () frix (ylx = 1) g) fxly (xly = 2) h) E(Y[X = 1) i) Are X and Y independent? Justify your