Company A has a beta of 0.90, while Company B's beta is 1.80. 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. O a. 11363% @b, 4.050% 8.3254 d. 6.075% 6.8.100W