I need help on these.

1. How does an open market purchase by the Fed increase the money supply? How would an increase in the required reserve ratio impact the money supply? 2. What is the difference in the Fed Funds Rate vs Discount Rate? What is "quantitativel easing" and how was it used during the Great Recession of 2007-2009? 3. According to the monetarists, the Great Depression of the 1930's should have been solved quicker with "correct" monetary policy instead of the fiscal policy advocated by Keynes. What was that "correct" policy supported by Friedman and the monetarists