Fill in the missing values in the table below. Assume that the value of the MPC does not change as real GDP changes. Also assume that the values represent billions of 2012 dollars. 

a. What is the value of the MPC? 

b. What is the value of equilibrium real GDP?

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Real GDP (Y) $19,000 20,000 21,000 22,000 23,000 Consumption (C) $15,600 16,400 Planned Invest- ment (1) $2,000 2,000 2,000 2,000 2,000 Government Purchases (G) $2,200 2,200 2,200 2,200 2,200 Net Exports (NX) - $400 -400 -400 -400 -400 Planned Aggregate Expenditure (AE) Unplanned Change in Inventories