all parts are one question, please help! thank you

Utility Functions 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? 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% c. Barry's certainty equivalent for an asset with an expected return of 8% and a standard deviation of 7% is 5.8%. Is he more or less risk averse than Ann