$1$a$)$ 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?

$1$b$)$ 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 $7\%?$

$1$c$)$ 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?