question in the picture

4. Effects of a tariff on international trade The following graph shows the domestic supply of and demand for soybeans in Zambia. The world price (PW) of soybeans is $535 per ton and is represented by the horizontal black line. Throughout the question, assume that the amount demanded by any one country does not affect the world price of soybeans and that there are no transportation or transaction costs associated with international trade in soybeans. Also, assume that domestic suppliers will satisfy domestic demand as much as possible before any exporting or importing takes place. (23 815 Domestic Demand Domestic Supply 780 745 710 675 640 605 PRICE (Dollars per ton) 570 535 500 465 0 50 100 150 200 250 300 350 400 450 500 QUANTITY (Tons of soybeans) If Zambia is open to international trade in soybeans without any restrictions, it will import 300| tons of soybeans. Suppose the Zambian government wants to reduce imports to exactly 100 tons of soybeans to help domestic producers. A tariff of per ton will achieve this. A tariff set at this level would raise in revenue for the Zambian government