Answer :
$174 billion is the answer.
Explanation:
Given data: Current GDP = $13.6 trillion, potential GDP = $14.0 trillion, Loader = 5.0, Tax multiplier = 4.0.
It has been assumed in the question that the other factors are constant
Change in the GDP = government multiplier (Change in G)
[tex]\Delta Y=3.3 \Delta G[/tex]
[tex]400 / 3.3=\Delta G[/tex]
[tex]\Delta \mathrm{G}=121 \$ \text { billion }[/tex] (increase in Government spending)
Now, [tex]\Delta \mathrm{Y}=\text { tax multiplier }(\Delta \mathrm{T})[/tex]
[tex]\Delta \mathrm{T}=400 / 2.3[/tex]
=174 $ billion (fall in taxes) (rounded off to the nearest integer figure).