Suppose the consumption function is C = $500 billion + 0.9Y and the government wants to stimulate the economy. By how much will aggregate demand at current prices shift initially (before multiplier effects) with
a) A $60 billion increase in government purchases?
b) A $60 billion tax cut?
c) A $60 billion increase in income transfers?
What will the cumulative AD shift be for
d) The increased G?
e) The tax cut?
f) The increased transfers?