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(a) Suppose that A owns all the mineral water, B owns all the orange juice, and C owns all the wine. A only likes orange juice, B only likes wine, and C only likes mineral water. What are the equilibrium prices for mineral water, orange juice and wine and the equilibrium quantities consumed by each individual?

   

(b) Now suppose that A owns everything and A only likes drinking orange juice, both B and C own nothing, both B and C like drinking wine only. Discuss the equilibrium quantities consumed by each individual.

   

(c) Now suppose that A equally likes these three goods, B equally likes the mineral water and orange juice, but does not like wine at all, and C only likes wine. Without considering who owns mineral water, orange juice, or wine initially, what allocations are Pareto optimal?

这题是从一本书上看来的，看的我一头雾水。里面既没有给定初始禀赋，也没有效用函数。想问问各位大神，这个题要怎么回答？到底是考什么东西呢？用市场出清的思路来回答对吗？

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关键词：效用函数 初始禀赋 市场出清 效用函 应用微观经济学 微观经济学 经济学 交换经济 福利经济学