You have observed the following returns over time: Year Stock X Stock Y Market 2014 12% 12% 11% 2015 18 6 10 2016 -12 -8 -14 2017 5 1 1 2018 20 11 18 Assume that the risk-free rate is 6% and the market risk premium is 4%. 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. %