Please write in some detail on all of the followings:
1. How does an increase in G affect the economy? Please show it using AD/AS frameowrk.
2. How does an increase in income tax rate affect economy? Please show it using AD/AS frameowrk.
3. Expansionary fiscal policy: what does it mean? How does it work?
4. Contractionary fiscal policy: what does it mean? How does it work?
5. Please distinguish between discretionary and automatic fiscal policy.