Consider an American call option on New Zealand dollars (NZ$) with a strike price of $0.8100/NZ$ traded at a premium of $0.0192 per NZ$ and with an expiration date three months from now. The option is for NZ$100,000.

Suppose that you have bought such a call option.

a. Plot your profit or loss on a graph should you exercise before maturity at a time when the NZ$ is traded spot at between $0.7000/NZ$ and $0.9200/NZS.

b. Find the break-even exchange rate.