You are constructing a portfolio for an investor with a risk aversion of A=10. You can invest their money in a riskless asset with a return of 0.014, or a risky asset with an expected return of 0.223 and a standard deviation of 0.19. What proportion of their assets should you put in the risky asset? An answer of O means none of their assets, an answer of 1 means all of their assets