無異曲線相關問題 - 經濟

科目：個體經濟學

寫題目時遇到這題完全不知如何下手,所以想上來問問

Mary consumes tomatoes and nectarines. Mary's indifference curves are kinky.
When she is consuming more tomatoes than nectarines, she is just willing to
trade 3 tomatoes for 1 nectarine. When she is consuming more nectarines than
tomatoes, she is just willing to trade 4 nectarines for 1 tomato. Let p1 be
the price of nectarines, and p2 be the price of tomatoes. Mary maxmizes her
utility subject to her budget constraint. Draw three of her indifference
curves. Under what condition will she consume only tomatoes?

我覺得我的問題好像是出在＂she is willing to trade ... for ..."這兩句上
不太懂他的文意，原本的解讀是在那個情況下，購買番茄/桃子數的比例
但想畫無異曲線卻沒什麼頭緒......
想麻煩大家給點提示或想法QQ 謝謝!!

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