A pension fund manager is considering three assets. The first is a stock fund, the second is a long-term government and corporate bond fund, and the third is a T-bill yielding 0.03. The probability distribution of the risky funds is as follows:

	Expected ret.	std. dev.
Stock fund	0.16	0.32
Bond fund	0.08	0.13

The correlation between the fund returns is 0.13. An investor has a risk-aversion of 7. For her complete portfolio (including stocks, bonds, and risk-free assets), what is the proportion of the stock fund?