Please assist with answers and brief explanation

18. If more American tourists visit South Africa. The of dollars increases and the dollar in the rand/dollar exchange rate (4 marks) A Supply; depreciates B Demand; depreciates C Supply; appreciates D Demand; appreciates 19. In balance-of-payments accounting, the sale of a foreign production facility by a SA firm is a item in the SA balance of payments; the deposit of funds in a foreign bank account by a SA citizen item in the SA balance of payments. (4 marks) A Debit; also is a debit B Debit; is a credit C Credit; is a debit D Credit; also is a credit 20. The table below shows a section of the national accounts for a small country in 2018. Answer the question that follows using the information provided in the table. Consumption expenditure 9 800 Government expenditure 3 500 Depreciation 500 Exports 2 200 Imports 1 900 Gross capital formation (investment) 2 500 Primary income payments 300 Primary income receipts 200 The value of Gross Domestic Product (GDP) is: (4 marks) A 16 100 B 19 900 C 16 600 D 15 600 21. To calculate gross national income (GNI) from gross domestic product (GDP), must be added and must be subtracted from GDP. (4 marks) A Primary income payments; primary income receipts Primary income receipts; primary income payments C Subsidies for local production; tariffs on production from the rest of the world D Taxes from the rest of the world; subsidies received from the rest of the world