This question relates to trade barriers. (a) Explain the difference between tariffs, non-tariff barriers, and export policies. Which is becom- ing more popular? Explain why. (b) Give some examples that we talked about of each type. Briefly summarize what each does. Hint: Tariff has three and non-tariff barriers has four that we talked about. (c) Why do countries use these policies? Who is better off with these policies? Who is worse off? (d) What are some concerns with these policies specifically related to politics