Q1. At Dave's current consumption bundle (involving positive units in both hot dogs and sodas) his marginal utility for hot dogs is 5 and his marginal utility for sodas is 4. If the price of one hot dog is $3 and the price of one soda is $2, is Dave currently maximizing his utility? If not, how should he reallocate his spending in order to increase his utility?
Q2. John spends $I on bottled water which he can buy in two sizes: 0.75 liter and 2 liter. The water is identical in the two sizes and John gets no utility from the containers themselves, only from the water. How to define a utility function?