Ford can borrow dollars at 12% or pesos at 80% for one year. The peso: dollar exchange

Question:

Ford can borrow dollars at 12% or pesos at 80% for one year. The peso: dollar is expected to move from $1 = Ps 3300 currently to $1 = Ps 4500 by year's end.
a. What is the expected after-tax dollar cost of borrowing dollars for one year if the Mexican corporate tax rate is 53%?
b. What is Ford's expected after-tax dollar cost of borrowing pesos for one year?
c. At what end-of-year will the after-tax peso cost of borrowing dollars equal the after-tax peso cost of borrowing pesos?

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...