QUESTION 2.7 A and B are two competing companies. An investor decides whether to buy a. 100 shares of A, or b. 100 shares of B, or c. 50 shares of A and 50 shares of B. A profit made on 1 share of A is a random variable X with the distribution P(X = 2) = P(X = -2) = 0.5. A profit made on 1 share of B is a random variable Y with the distribution P(Y = 4) = 0.2, P(Y = -1) = 0.8. If X and Y are independent, compute the expected value and variance of the total profit for strategies (a), (b), and (C)