help please

4. You take fin 3030 and decide to contribute $1,000 into a retirement account which you expect to grow at 7.5% per year. Your friend, who hasn't taken fin 3030, decides to wait 10 years to invest the same amount in a retirement account at the same expect annual return. How much will each of you have saved up in your respective accounts when you are ready to retire 45 years from now