Historical Returns: Expected and Required Rates of Return You have observed the following returns over time: Market Stock Y 13% 11% Year 2014 2015 2016 2017 2018 Stock X 13% 18 -15 10 -10 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: c. What is the required rate of return on a portfolio consisting of 80% of Stock X and 20% of Stock Y? Do not round intermediate calculations. Round your answer to two decimal places