7. You are a small money manager managing $25,000,000 in assets. Your investment portfolio consists of 10% Tbills (with an estimated beta = 0), 15% bonds (with an estimated beta = 0.55), 35% mid-cap stocks (with an estimated beta = 1.00), and 40% growth stocks (with an estimated beta = 1.20). a. The risk-free rate, rap, is 2%. The market risk premium, (rM - r312), is 5%. What is the required rate of return on your investment portfolio? (3 points) b. If you switch $750,000 out of Tbills and invest $250,000 of it in growth stocks and $500,000 of it in mid-cap stocks, what would be the required rate of return on your portfolio? (3 points)