澳洲同学发给我的微观经济学原题～

澳洲同学发给我的微观经济学原题～
1．A village,which has a river running through it and in which 2,000 people live,has a produce market each week.In that market 2,400 dozen eggs are currently sold per week at a price of $1.25 per dozen.1,200 people live on the West side of the river and at $1.25 they buy 1,600 dozen eggs.There elasticity of demand is - 1.5 at the current price.The remaining 400 people who live on the East side of the river buy 800 dozen eggs and have a demand elasticity at the current price of - 3.Calculate the elasticity of demand for the market demand curve for this town at the price of $1.25 per dozen.
2．A consumer spends all their income on three goods.They buy 150 units of good X when PX = $10,350 units of good Y when PY = $25 and 220 units of good Z when PZ = $45.Suppose the price of X increases by 10% and there is no change in the price of the other goods.In the new situation the consumer is observed to buy 377 units of Y and 205 units of Z.Calculate this consumer's price elasticity of demand for X.