a) List four specific policy measures - whether fiscal or monetary - that a government can use to remove a recessionary output gap (4 marks) b) List three motives for people to hold money. (3 marks) c) Briefly distinguish between "validation" and "accommodation" in relation to inflation. (4 marks) d) Consider an economy that is in equilibrium at potential GDP. If this equilibrium is disturbed by an isolated negative supply shock, two different outcomes are possible, depending on what action the authorities take. With reference to a fully labelled diagram, give a complete explanation of this statement