How do purchasing-power parity, interest rate parity, and the International Fisher Effect explain the relationships among the

Question:

How do purchasing-power parity, interest rate parity, and the International Fisher Effect explain the relationships among the current spot rate, the future spot rate, and the forward rate?

Fisher Effect
The Fisher Effect is an economic theory created by economist Irving Fisher that describes the relationship between inflation and both real and nominal interest rates. The Fisher Effect states that the real interest rate equals the nominal interest...