A pension fund manager is considering three mutual funds. The first is a stock fund, the second is a long-term government and corporate bond fund, and the third is a T-bill money market fund that yields a sure rate of 5.9%. The probability distributions of the risky funds are: Expected Return 20 Standard deviation Stock fund (S) Bond fund (3) 438 The correlation between the fund returns is .0721. Suppose now that your portfolio must yield an expected return of 18% and be efficient, that is on the best feasible CAL. a. What is the standard deviation of your portfolio? (Do not round Intermediate calculations. Round your answer to 2 decimal places.) Standard deviation % b-1. What is the proportion invested in the T-bill fund? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Proportion invested in the T-bill fund % b-2. What is the proportion invested in each of the two risky funds? (Do not round intermediate calculations. Round your answers to 2 decimal places.) Proportion Invested Stocks Bonds % %