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Shi has a risk aversion of A=4.8. She can invest in a riskless asset with a return of 5.5%, or a risky asset with an expected return of 18.1% and a standard deviation of 30.5%. 1. What is Shi's certainty equivalent for the risky asset? 2. What would the best capital allocation be for Shi? 3. What is the expected return and standard deviation of Shi's optimal portfolio? 4. What is the Sharpe ratio of Shi's optimal portfolio