9. (5%) Mary and Danny are risk averse and von Neumann-Morgenstern expected utility maximizers with utility function \( U(w) = w^{\frac{1}{2}} \) at all wealth level \( w > 0 \). Suppose that Mary's wealth is $10,000 and she may face a 40% chance of losing $7,500. Danny' wealth is $1,000,000 and he also faces a 40% chance of losing $7,500. The certainty equivalent of wealth for Mary, which is the wealth level with certainty providing Mary the same expected utility as the risky bundle, is (9a). The certainty equivalent of wealth for Danny is (9b).
9a