I am posting this questions again please provide me clear answer. Not in Excel sheet. Formulas and Working

Thanks

(6-14) Historical Returns: Expected and Required Rates of Return You have observed the following returns over time Year 2009 2010 2011 2012 2013 Stock X 19 -16 3 20 Stock Y 7 11 Market 10 -12 15 Assume that the risk-free rate is 6% and the market risk premium is 5% What are the betas of Stocks X and Y? 2 _ What are the required rates of retum on Stocks X and Y? 3 _ What is the required rate of retum on a portfolio consisting of 80% of Stock X and 200 0 of Stock Y?