Finance Help: You are planning to invest $5,500 in an account earning 7% per year for retirement.

You are planning to invest $5,500 in an account earning 7% per year for retirement.
a) If you put the $5,500 in an account at age 23, and withdraw it 40 years later, how much will you have?
b) If you wait 10 years before making the deposit, so that it stays in the account for only 30 years, how much will you have at the end?