A European recession and the U.S. economy

a. In 2015, European Union spending on U.S. goods accounted for 18% of U.S. exports, and U.S. exports amounted to 15% of U.S. GDP. What was the share of the European Union spending on U.S. goods relative to U.S. GDP?

b. Assume that the multiplier in the United States is 2 and that a major slump in Europe would reduce output and imports from the U.S. by 5% (relative to its normal level). Given your answer to part (a), what is the impact on U.S. GDP of the European Slump?

c. If the European Slump also leads to a slowdown of the other economies that import goods from the United States, the effect could be larger. To put a bound to the size of the effect, assume that U.S. exports decrease by 5% (as a result of changes in foreign output) in one year. What is the effect of a 5% drop in exports on U.S. GDP?