Repeat Worked-Out Problem 10.4 (page 328), but assume that inAngela's view one kg of food this year

Question:

Repeat Worked-Out Problem 10.4 (page 328), but assume that inAngela's view one kg of food this year and one kg of food next year are perfect complements. In other words, assume that her indifference curves are L-shaped, and that the corner of the L in each curve lies on the 45-degree line. How would you interpret her preferences?