please answer

Economics C = 0.9{DI} + 4000 C = Consumption expenditure, DI = Disposable Income | = 4000 | = Investment expenditure (3 = 4000 G = government expenditure X = 2600 X = spending on exports M = 3000 M = spending on imports DI = Y - T Y = real GDP, T = tax revenuesb T = 4000 If we continue to assume that Yp Y* = 9000, then by how much must taxes (T) change in order to close this output gap? (note: it's strongiy recommended that you use the tax multiplier to answer this question. Be sure to round your answer to the nearest whole number and you do not need to include a S with your answer: but if there's a decrease in expenditure here, be sure to include a negative sign with your answer. 5.9., a decrease in T of$5000 should be written as -5000