1. Short answer questions: (a) How might trade barriers affect the short run current exchange rate? (b) What were the Russian capital controls imposed in Spring 2022, and why did they help support the ruble? Demonstrate on a graph of the Russian asset market. HINT: put the USruble exchange rate on the yaxis and Russian denominated assets on the xaxis. (c) What's the difference between a sterilized and un-st|erilized foreign exchange intervention