(a) Mr Blue, Miss Red and Mrs Green all prefer more wealth to less. This is rational from an economist's point of view.

(b) Mr Blue is risk averse. He will not enjoy a fair gamble and would like to buy fairly priced insurance.

(c) Miss Red is risk-neutral. She will not enjoy a fair gamble but wouldn't oppose it either. Similarly with fairly priced insurance.

(d) Mrs Green is risk-loving. She would enjoy a fair gamble and would dislike fairly priced insurance.

(e) Mr Blue would like to buy insurance, but only if it is fairly or under priced.

(a) Mr Blue is as happy with zero wealth as he is with $1,000. Similarly for Miss Red and Mrs Green.

(b) All of the people would appear irrational to an economist. Though Mr Blue appears to be rational when he has more than $192 in wealth.

(c) Mr Blue is risk averse. Miss Red is risk neutral. Mrs Green is risk loving.

(d) Miss Red is totally indifferent to how much wealth she has. She doesn't care about gaining or losing money.

(e) Mr Blue prefers more to less up to a wealth of around $192. At about $192 he is the happiest he can be. This is his bliss point. With more than $192 he becomes less happy.

(a) All people prefer more rather than less wealth which is rational.

(b) Mr Blue is risk averse, Miss Red is risk neutral and Mrs Green is risk loving.

(c) Mr Blue's certainty equivalent of the gamble is $225. This is less than his current $500 which is why he would dislike the gamble.

(d) Miss Red's certainty equivalent of the gamble is $500. This is the same as her current $500 which is why she would be indifferent to gambling.

(e) Mrs Green's certainty equivalent of the gamble is $793.70. This is more than her current $500 which is why she would like the gamble.

(a) All people would appear rational to an economist since they prefer more wealth to less.

(b) Mrs Green and Miss Red would appear unusual to an economist since they are not risk averse.

(c) Mr Blue's certainty equivalent of the gamble is $64. This is less than his current wealth of $256 which is why he would refuse the gamble.

(d) Miss Red's certainty equivalent of the gamble is $256. This is the same as her current wealth of $256 which is why she would be indifferent to playing or not.

(e) Mrs Green's certainty equivalent of the gamble is $512. This is more than her current wealth of $256 which is why she would love to play.

(a) Mr Blue is as happy with zero wealth as he is with $1,000. Similarly for Miss Red and Mrs Green.

(b) All of the people would appear irrational to an economist. Though Mr Blue appears to be rational when he has more than $192 in wealth.

(c) Mr Blue is risk averse. Miss Red is risk neutral. Mrs Green is risk loving.

(d) Miss Red is totally indifferent to how much wealth she has. She doesn't care about gaining or losing money.

(e) Mr Blue prefers more to less up to a wealth of around $192. At about $192 he is the happiest he can be. This is his bliss point. With more than $192 he becomes less happy.