6) A portfolio has an expected rate of return of 0.15 and a standard deviation of 0.15. The risk-free rate is 6%. An investor has the following utility function: U = E(r) - (A/2)s 2 . Which value of A makes this investor indifferent between the risky portfolio and the risk-free asset?

Note: If possible, could you answer this question in the format you'd use on a scientific calculator? As in the exam, I won't have access to excel.