At present, the US dollar is worth 140 yen in the spot market. The nominal Japanese interbank

Question:

At present, the US dollar is worth 140 yen in the spot market. The nominal Japanese interbank Euromarket interest rate, expressed in terms of the 90-day return, is 4 percent, and for the United States this interest rate is 8 percent. If the interest-rate parity theorem holds, what is the implied 90-day forward in yen per dollar? What would be implied if the US interest rate mentioned above were 6 percent instead of 8 percent?
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...