Consider an economy with autonomo consumption of 700 , marginal propensity to consume of 0.8 , net income taxes of 100, investment spending of 300 , government spending of 250 , and net export of 80 . a) What is the value of unplanned changes in the inventory investment when real GDP is $7000? b) How would the graph of the aggregate planned expenditure change if net export increases by 20 ? What would be the value of the new equilibrium real GDP? c) What is the multiplier for this economy? d) Verify your answer to part f ing the multiplier: solve for the value of new equilibrium real GDP in the same scenario ing the multiplier this time.