Stocks A and B have the following probability distributions of expected future returns: a. Calculate the expected rate of return, r^B, for Stock B ( r^A=13.10%.) Do not round intermediate calculations. Round your answer to two decimal places. b. Calculate the standard deviation of expected returns, A, for S tock A ( B=18,18%.) Do not round intermediate calculations, Round your answer to two decimal places. % Now calculate the coefficient of variation for Stock B. Do not round intermediate calculations. Round your answer to two decimal places. c. Assume the risk-free rate is 3.5%. What are the Sharpe ratios for Stocks A and B ? Do not round intermediate calculations. Round your answers to four decimal places. Stock A: Stock B