Can i have the calculate process?

(10 points) 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: Stock Beta Investment $460,000 500,000 B 1.5 -0.5 1,260,000 2,600,000 1.25 0.75 If the market's required rate of return (RM) is 8%, and the risk-free rate (Rt) is 4%, what is the fund's required rat of return