can you explain me and show your work

17. A U.S. multinational corporation has a subsidiary in Mexico. After a Presidential election in the United States, the U.S. renegotiates the North America Free Trade Agreement (NAFTA) to incor- porate a 15% tariff (tax) on all goods imported to America from Mexico. This makes imports from Mexico more expensive to Americans, all else held constant. What is the net effect on the nominal MXN/USD exchange rate? What is the net effect on the real MXN/USD exchange rate? What is the net effect on the US multinational's net income in U.S. Dollars