i need help on a and b

stock has a required retum of 13%, the risk-free rate is 4.5%, and the market risk premium is 5%. a. What is the stock's beta? Round your answer to two decimal places. b. If the market risk premium increased to 8%, what would happen to the stock's required rate of return? Assume that the risk-free rate and the beta remain unchanged. Do not round intermediate calculations. Round your answer to two decimal places. 1. If the stock's beta is equal to 1.0 , then the change in required rate of return will be greater than the change in the market risk premium. If. If the stock's beta is equal to 1.0 , then the change in required rate of return will be less than the change in the market risk premium. III. If the stock's beta is greater than 1.0 , then the change in required rate of return will be greater than the change in the market risk premium. IV. If the stock's beta is less than 1.0 , then the change in required rate of return will be greater than the change in the market risk premium. . If the stock's beta is greater than 1.0 , then the change in required rate of return will be less than the change in the market risk premium. Stock's required rate of return will be \%