This is the article: https://research.stlouisfed.org/publications/page1…  
Please do the following for the article:
2. Answer the following questions, using the article provided.
a. What is the most important role of the Federal Reserve Bank?
b. What are the 4 key tools that the Federal Reserve uses to implement monetary policy?
c. Explain the movement of the federal funds rate and the economy.   Especially explain the two periods when the federal funds rate was  essentially zero percent. See Figure 1.
d.  Explain Figure 3. 
e. Explain Figure 4. 
f.  Explain Figure 5.
g. How does the Federal Reserve Bank presently conduct monetary  policy?  You can answer this question by also answering how does the  Federal Reserve Bank decrease interest rates by 1 percent?  I do not  need exact numbers, so just describe the process.