A stock has a required return of 15%, the risk-free rate is 4.5%, and the market risk premium is 4%. a. What is the stock's beta? Round yc answer to two decimal places. 2.63 \\'9 b. If the market risk premium increas to 6%, what would happen to the stock's required rate of return? Assume that the risk-free rate and beta remain unchanged. Do not ro intermediate calculations. Round y answer to two decimal places. I. If the stock's beta is equal to 1. then the change in required rate return will be greater than the change in the market risk premium