The diagram shows an economy with an initial equilibrium real output of ${Y_1}$ at a price level of ${P_1}$.
Which combination of events is likely to cause the equilibrium real output to rise to ${Y_2}$?

an increased budget deficit and a fall in energy costs
2 )
an increased budget surplus and a rise in energy costs
3 )
an increased trade deficit and a fall in indirect tax
4 )
an increased trade surplus and a rise in indirect tax
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