The rate of output and planned expenditures for the economy of Timbuktu are shown in the following table: Total Output Planned Aggregate Expenditures (Two-Sector Economy) (Real GDP in billion dollars)...

The rate of output and planned expenditures for the economy of Timbuktu are shown in the following table:

              Total Output              Planned Aggregate Expenditures                                                                  (Two-Sector Economy)
(Real GDP in billion dollars)                          (in billions)


                   5,000                                                5,250
                   5,500                                                5,500
                   6,000                                                5,750
                   6,500                                                6,000
                   7,000                                                6,250


a)  How much will be the equilibrium level of output/income if there will be an autonomous increase in investment of $250 billion?