Suppose the consumption function is
c = $400 billion + 0.8y and the government wants to stimulate the economy. By how much will aggeregate demand at current prices shift initially (before multiplier effects) with
(a) A $50 billion increase in government purchases?
(b) A $50 billion tax cut?
What will the cumulative AD shift be for
(d) The increased G?
(e) The tax cut?
(f) The increased transfers?