Can you answer these 3 questions?

1) What effect would an appreciation of the U.S dollar, relative to the Chinese Yuan, have on both the quantity of our exports to China and the quantity of our imports from China. 2) Search the internet and report the current ("current" should be within a day or two) exchange rate between the U.S. dollar and the Chinese Yuan. 3) What is the effect on the U.S. economy of placing tariffs on products imported into the U.S. from other countries? Briefly explain