1. When the government's fiscal deficit increases, it means that the supply in the loanable funds market decreases, which leads to an increase in the real interest rate, and the corresponding net capital outflow will inevitably decrease, because domestic investment is more favorable. The net outflow of capital corresponds to the money supply in the foreign exchange market, so the money supply decreases. Therefore, the real exchange rate in the foreign exchange market is bound to rise, so domestic net exports are bound to decrease.

2. When the net export will decrease at a given exchange rate, the foreign exchange market should be considered first. The demand for money in the foreign exchange market corresponds to net exports, so the demand in the foreign exchange market decreases, leading to a decline in the real exchange rate.

In this case, we should be careful not to think that the net export corresponds to the net outflow of capital, so let's move the first two figures, that is, we think that the net outflow of capital decreases and the market demand in loanable funds decreases. Why? Pay attention to the words "at the established exchange rate". Under the given exchange rate, the reduction of net exports will only correspond to the reduction of money demand under the given exchange rate. In fact, the reduction of money demand will lower the exchange rate, so the final net export will not change.

3. When there is capital flight or internal growth, we should consider the change of net capital outflow and the change of loanable funds market demand (note that it is not the change of supply, because the supply in loanable funds market is only related to savings), that is, move the first two pictures first and see the change of the third picture.