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 rate of 8%. The probability distribution of the risky funds is as follows:

Expected Return Standard Deviation

Stock fund (S) 20% 30%
Bond fund (B) 12 15

The correlation between the fund returns is. 10.
You require that your portfolio yield an expected return of 14%, and that it be efficient, on the best feasible CAL.

What is the standard deviation of your portfolio?