Security A and B have the following probability distribution of expected future returns: Stock X -11% Probability 0.30 0.50 0.20 Stock Y 19% -9.50% 21 23 I. Calculate the expected rate of retum for each stock. II. Calculate the standard deviation of retum for each stock. III. Calculate the coefficient of variation for each stock and recommend which one you select if you take only one project IV. Assume that someone held a portfolio consisting of 45 percent of stock X and 55 percent of stock Y and the correlation between stock X and Y is -0.489. Calculate the average rate of retum and standard deviation for this portfolio