Repeat the previous exercise, except that after six months the exchange rate is at waf/fly 1, not

Question:

Repeat the previous exercise, except that after six months the exchange rate is at waf/fly 1, not 0.9.

Use the following time-0 data for the fictitious currency, the Walloon Franc (waf) and the Flemish Yen (fly), on Jan. 1, 2000. The spot exchange rate is 1 waf/fly.

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...