Increasing transactions costs of selling an asset make the asset

Suppose the measured unemployment rate is 4.5% and the true natural rate of unemployment is 5.1%. What should policymakers do in this situation? Suppose that the chair of the Federal Reserve believes the natural rate of unemployment to be 4.0%

What will the chair of the Fed do in this situation, and will this be a good decision?

When Americans decrease their demand for Japanese goods,

A) the supply of dollars will rise, and the demand for yen will rise. B) the demand for dollars will rise, and the demand for yen will rise. C) the supply of dollars will fall, and the demand for yen will fall. D) the demand for dollars will fall, and the demand for yen will rise.