What if your preference for wine and beer is instead given by U(w, b) = w b, what would you buy and how would you categorize the two goods in terms of their substitutability? (5 points) c. Suppose wine and beer are perfect substitutes but the marginal utility of wine is triple that of beer, what would be the new utility function and what would you buy for each good? (5 points) 4. Martha receives utility from consuming two commodities: x = food