45.-47. Portfolio Analysis Assume that you have just received information from your investment advisor that your portfolio has reached a value of S500,000. Your portfolio consists of three stocks, as follows: Stock Amount Invested -I Beta 125 2.00 .90 - $175,000 $200,000 $125.000 S500,000 Total: a. Calculate the beta of this investment portfolio. b. Assume that the expected market return (r) is 10 percent and the expected risk-free rate (RF) is 3 percent. What is the expected return (r j ) for this investment portfolio