Please help me to provide the summary or definition of each of the following concepts. Please help me provide examples or numerical answers when appropriate.

1.Expansionary Monetary Policy

- what constitute expansionary monetary policy and under what economic scenario should it be implemented?

2.Contractionary Fiscal Policy

- what constitute contractionary fiscal policy and under what economic scenario should it be implemented?

3.Opportunity Cost

- define opportunity cost correctly and provide at least 2 examples

4.National Debt

- define national debt and provide the amount of national debt as of the end of 2020

5.the Federal Open Market Committee

- provide a minimum of 3 characteristics of FOMC within the Federal Reserve Banking System