need help with 3 homework problems thanks

2. Suppose that most of the fluctuations in real GDP that we observe in the real world are due to changes in consumer sentiment. Can fiscal policy be used to stabilize real GDP and prices? Can monetary policy be used to stabilize real GDP and prices? 3. Now suppose that when monetary policy is used, it affects the economy only after a long delay. Discuss the implications of this in relation to what you argued in question 2 about whether monetary policy can be used to stabilize real GDP and prices. 4. Suppose that most of the fluctuations in real GDP that we observe in the real world are due to temporary changes in productivity (A). Can fiscal policy be used to stabilize real GDP and prices? Can monetary policy be used to stabilize real GDP and prices