A pension fund manager is considering three mutual funds. The first is a stock fund, the second is a bond fund, and the third is a T-bill risk-free fund that yields a sure rate of 5%. Like any other rational investor, the fund manager likes higher expected return and lower risk. The probability distributions of the risky funds are: Expected Return Standard Deviation Stock funds (S) 13% 18% Bond funds (B) 7% 9%