1. Diberi keluk permintaan domestik bagi barang X di sebuah negara kecil adalah Q'+40P=160 , manakala keluk penawaran domestik bagi barang X di negara itu pula adalah Q'- 40 P=80 Given the domestic demand curve for good X in a small country is Q'+40P=160 , while the domestic supply curve for good X in that country is Q'- 40 P=80 (a) Tampa perdagangan antarabangsa, apakah harga keseimbangan, kuantiti pengeluaran dan kuantiti penggunaan? In the absence of trade, what would be the equilibrium price, the quantity produced and the quantity consumed? (b) Import barang X wujud di pasaran dunia dengan harga P =0.5 . Lukiskan keluk penawaran total. Imports of good X are available in the world market with the price P -0.5 . Draw the total supply curve. (C) Andaikan negara tersebut mengenakan 80 peratus tarif ad valorem ke atas import barang X. Apakah nilai kesan penggunaan, kesan pengeluaran, kesan perdagangan, dan kesan hasil daripada tarif tersebut? Suppose that the country imposes an 80 percent ad valorem tariff on the imports of good X. What would be the value of consumption effect, production effect, trade effect, and revenue effect due to the tariff? (d) Kira dan terangkan kos dan faedah tarif tersebut? Calculate and explain costs and benefits of the tariff