Historical Returns: Expected and Required Rates of Return You have observed the following returns over time: Assume that the risk-free rate is 4% and the market risk premium is 7%. Do not round intermediate calculations. What is the beta of Stock X? What is the beta of Stock Y? What is the required rate of return on Stock X? % What is the required rate of return on Stock Y? % What is the required rate of return on a portfolio consisting of 80% of Stock X and 20% of Stock Y? %