6. If you turn down the 50-50 gamble of win $18, lose $15, that entails that your value for the 18th dollar
above your current level of wealth (W) is no more than 5/6 (= 15/18 = 0.833) of the value of the 15th
dollar below W. Now, suppose you are averse to the same gamble when you are $33 above W. That
entails that your value for the 51$^{st}$ dollar above W is no more than 5/6 of your value for the 18th dollar
above W. Recall, though, that your value for the 18th dollar above W is no more than 5/6 of your value for
the 15th dollar below W, which makes your value for the W + 51 dollar 0.694 (= (5/6)$^2$) of the value of the
W \textendash{} 15 dollar. Basically, your marginal utility of money declines almost 17% for every $33 of additional
wealth over W. Thus we have: