company a has a beta of 0.70, while company b's beta is 1.45. the required return on the stock market is 9.00%, and the risk-free rate is 2.25%. what is the difference between a's and b's required rates of return? (hint: first find the market risk premium, then find the required returns on the stocks.) do not round your intermediate calculations. a. 4.25% b. 5.01% c. 4.71% d. 5.06% e. 4.30%