A discrete random variable, X, has the following probability distribution: (a) (b) (c) (d) (e) I Xd.m 1 2 P(X) 0.15 0.25 0.20 0.40 What is the probability that X is not more than 1? What is the probability that X is at least 27 Compute E(x), the expected value of x. Compute of the variance of x Compute o, the standard deviation of x.