8. (3%) If Francesca can make the efforts, what is the maximal value of I such that Francesca is willing to do so?

四、Both Gigi and Helen maximize the expected utility, with a (Bernoulli) utility function $u(x) = \ln x$, where $x$ is the amount of money they can enjoy. Each of them has an initial wealth $10, but may suffer from an accident that occurs with probability 1/4. 1. (3%) Are they risk neutral, risk loving, risk averse, or none of these?