8-7 PORTFOLIO REQUIRED RETURN Suppose you are the money manager of a $4.82 million investment fund. The fund consists of four stocks with the following investments and betas: Investment 460,000 500,000 1,260,000 2,600,000 Stock Beta 1.50 (0.50) 1.25 0.75 If the market's required rate of return is 8% and the risk-free rate is 4%, what is the fund's required rate of return