Good Night, Hello All Tutors, I want to know how to solved this question, please give me a formula and answer from you, I will combine with mine

I opened discuss :

Baylor Bank, a British investment bank believes the New Zealand dollar will appreciate over the next 10 days from $.48 to $.50. It also believes that the British pound will stay constant at the value of $1.3 over the next 10 days. The following annual interest rates apply :