求大神用英文帮我解答这道经济学的题目。。感激不尽

Question

Assume that the (weekly) market demand and supply of tomatoes are given by the figures shown below:
Price ($ per kilo)
4.00
3.50
3.00
2.50
2.00
1.50
1.00
Qd (000 kilos)
30
35
40
45
50
55
60
Qs (000 kilos)
80
68
62
55
50
45
38

(a) What are the equilibrium price and quantity?
(b) What will be the effect of the government fixing a minimum price of (i) $3.00 per kilo; (ii) $1.50 per kilo?
(c) Suppose that the government paid tomato producers a subsidy of $1.00 per kilo. (i) Give the new supply schedule. (ii) What will be the new equilibrium price? (iii) How much will this cost the government?
(d) Alternatively, suppose that the government guaranteed tomato producers a price of $2.50 per kilo. (i) How many tomatoes would it have to buy in order to ensure that all the tomatoes produced were sold? (ii) How much would this cost the government?
（e)Alternatively, suppose it bought all the tomatoes produced at $2.50. (i) At what single price would it have to sell them in order to dispose of the lot? (ii) What would be the net cost of this course of action?

Answer 1

郭敦顒回答：
Answer——
(a) The market demand of the weighted average price and average demand
Instance data，
Σ（Pi Qdi）/ΣQdi =717.5/315=2.28，i=1，2，3，4，5，6，7
(b) (ii) $1.50 per kilo
(c)
P=2.28，Qd=45；
P′=1.50，
ΔP=P′-P=1.5-2.28=-0.78
ΔQd=Qd×|-0.78|/2.28=45×34.2%=15.4
Qd′=Qd+ΔQd=45+15,4=60.4
ΣQd′=7×60.4=422
(i) Give the new supply schedule
30×1.342=40
35×1.342=47
40×1.342=54
45×1.342=60
50×1.342=67
55×1.342=74
60×1.342%=80
(ii) P′=1.50
(iii) $315(According to the demand of government subsidies)
(d) (i) 422kilos.(ii) $422
（e) (i) Yes. (ii) Cost and the total cost of government subsidies;
Tomato producer net cost is cost and government subsidies for the balance.
Instance data,
2.28-1.00=1.28.

追问

答非所问。。。

追答

郭敦顒回答：
不致于全不对。
我断言你不懂经济，也学不会经济。

追问

呵呵，我们老师上课已经讲了这题了，完全不一样，拜托，你自己回答里面都透露出对自己答案的不自信了。。要装大神麻烦你把知识学全点再来教训别人。