Outcome p(ac) = P(X = X = -1 1/3 X =0 1/3 X = 1 1/3(a) What is the mean of X ? (b) What is the variance of X ? (0) Suppose you obtain a sample {X3} of 10 observations and compute X . Compute P(0.1 S X S 0.1) using a normal approximation. (d) Does X follow a normal distribution? Justify your answer. (e) Are your answers to (a) and (b) exact? Why or Why not