please answer the following questions:

21. A specific tariff A) is a percentage of the value imported B) is the same as Ad valorem tariffs C) is a tax that is levied as a fixed charge for each unit of goods imported D) decreases a government's revenue 22. A producer's marginal cost for the 10th unit of output is 20 dollars. The price for the 10th unit of output is 30. The producer surplus is A) 20 B) 30 C)50 D) 25 E) 10 23. Ad valorem tariffs are A. import taxes stated in ads in industry publications. B. import taxes calculated as a fixed charge for each unit of imported goods. C. import taxes calculated as a fraction of the value of the imported goods. D. the same as import quotas 24. Which is a regulation that requires a specified fraction of a final good to be produced domestically? A. Import quota. B. Import tariff. C. Export subsidy D. Local content requirement. E. Voluntary export restraint. 25. _works like an import quota, except that the quota is imposed by the exporting country rather than the importing country. A. Investment quota. B. Import tariff. C. Export subsidy D. Local content requirement. E. Voluntary export restraint. 26. For a small country importing wheat, the international price of wheat is 30. If this small country imposes a tariff of 5 on the import of wheat, the price of wheat in this country will be _. A. 5 B. 25 C. 30 D. 33 E. 35 27. For a large country importing wheat, the international price of wheat is 30. If this large country imposes a tariff of 5 on the import of wheat, the price of wheat in this country is most likely to be _. A. 5 B. 25 C. 30 D. 33 E. 35 28. When price increases, which of the following is true? A. Consumer surplus increases. B. Consumer surplus does not change. C. Producer surplus does not change. D. Producer surplus decreases. E. Consumer surplus decreases. 29. When price increases, which of the following is true? A. Producer surplus decreases. B. Consumer surplus does not change. C. Demand increases. D. Supply decreases. E. Producer surplus increases. 30. Which of the following is true? A. Tariff increases the amount of trade. B. Quota increases the amount of trade. C. VER increases the amount of trade. D. Export subsidy increases the amount of trade. E. Tariff does not change the amount of trade