Utility Functions

Ann would be equally happy with a riskless asset that paid $5\%$ per year, and a risky asset with a yearly expected return of $16\%$ and a return standard deviation of $17\%.$ What is Ann$$s coefficient of risk aversion?

Would Ann prefer an investment with an expected return of $10\%$ and a standard deviation of $9\%$ or an investment with an expected return of $8\%$ and a standard deviation of $7\%$

Barry$$s certainty equivalent for an asset with an expected return of $8\%$ and a standard deviation of $7\%$ is $5\mathrm{.}8\%.$ Is he more or less risk averse than Ann?