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 5.0%. The probability distributions of the risky funds are: Expected Return 11% Stock fund (5) Bond fund (8) Standard Deviation 40% 20% 6% The correlation between the fund returns is 0500. Suppose now that your portfolio must yield an expected return of 9% 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 ploces.) 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