<FONT face=新宋体>Assume that the only supplies of bread and cigarettes in a prinsoner-of-war camp are controlled by thr commandant and that POW is given 4 loaves of bread and 4 packs of cigarettes at the start of each week. The prisonerers are allowed to trade among themselves and we observe that one particular prinsoner trades bread for cigarettes atthe going prices so  that  during the first week he consumers 5 packs of cigarettes and 3 loaves of bread.  In the next week for some reason, we find that the going price has changed and this prinsoner finds aftertrading, his preferred consumption is (1)7 packs of cigarettes and 2 loaves of bread <BR>(2)2 packs of cigarettes and 5 loaves of bread <BR>(3)2 packs of cigarettes and 7 loaves of bread <BR>under these three conditions above respectively, how would you rank the three situations(original 4 packs of cigarettes and 4 loaves of bread, the final consumption in the first week , the final consumption in the second week) </FONT><BR><BR>不太明白以什么标准rank,大家帮忙给点建议