1. Assume the risk-free rate of return is 2% and the market rate of return is 11%. Consider the following three investments alternatives. ROR St.Dev. Beta X 10% 16% 0.8 Y 15% 25% 1.4 Z 12% 18% 1.2 a) Calculate the coefficient of variations and rank the three investments. b) Calculate the Sharpe ratios and rank them. Is the ranking the same as in (a)? why or why not? c) Use the CAPM and rank the investments. Is the ranking the same as in (a) and (b)?