A) I mentioned a few times during class that the US and the World may have been "lucky" to have Ben Bernanke as the FED Chairman when the 2008 Financial Crisis happened, as he had studied and vowed not to repeat the mistakes made by the FED after the 1929 Financial Crisis which led to the Great Depression. In no more than 4 sentences, explain (i) the main mistake made by the FED in the years following the 1929 stock market crash and (ii) if both Classics and Keynesians would agree that the FED "mistake" was a major determinant of the sharp GDP contraction and unemployment rate increase