Historical Returns: Expected and Required Rates of Return You have observed the following returns over time: Assume that the risk-free rate is 7% and the market risk premium is 5%. a. What are the betas of Stocks X and Y ? Do not round intermediate calculations. Round your answers to two decimal places. Stock X: Stock Y : b. What are the required rates of return on Stocks X and Y ? Do not round intermediate calculations. Round your answers to two decimal places. Stock X: % Stock Y:% %