Question 5 1 pts Which of the following statements is TRUE? For any discrete random variable X, we have px (b) = " Fx (k). O For any continuous random variable Y and anyr , we have fy (r ) = P ( Y = r). O For any discrete random variable X and any k , we have Px (k) = P(X = k). There exist a random variable Z and a value / such that Fz (t) # P (Z