For a given real exchange rate, how are a country's net exports affected by an increase in

Question:

For a given real how are a country's net exports affected by an increase in domestic income? an increase in foreign income? How does an increase in the domestic real interest rate affect the real and net exports? Explain.
Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...