Can you please help me with this problem? Thank you!

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 4.8%. The probability distributions of the risky funds are Stock fund (S) Bond fund (B) Expected Return 18% 9% Standard Deviation 38% 32% The correlation between the fund returns is 0.13 Suppose now that your portfolio must yield an expected return of 12% 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 %