for the whole class, we talked about how to model the economy and then proposed two types of policies: fiscal and monetary. a) [3 points] when an economy is in a recession, does the government actually need to do anything? explain b) [3 points] if an economy was in an expansion, what type of policy should the government do? fiscal or monetary? explain your choice and the appropriate action to remedy the problem. c) [2 points] the model that we built, the AE/Y and AD/AS. whats the difference between them? do we need both to talk about policy? explain. d) [2 points] would an economy with a population which saved a lot (mpc=0.5) be more or less impacted by monetary policy, than one which did not save a lot (mpc=0.9)? explain