please answer with explanation

The Keynesian Cross we reviewed in class is given by the equality of actual output (Y) and Aggregate demand (D) J Y=D C=Co+cl(Y-T) EP\" D=C+I+G+CA( P ,YT,YFTr) where cl denotes the marginal propensity to consume, I . T and G the exogenously given Investment, taxes and government expenditures, E the nominal exchange rate, P and P' the domestic and foreign price levels. Suppose that due to sudden news about widespread corruption in Country X. investment in that country declines temporarily from I1 to I2 with I2