can someone please help me answer this question

4. Suppose Sam deposits $100 in an account at the end of this year, $300 at the end of the next two year, $50 at the end of the following year. If the annual interest rate is 4%, how much will be in the account immediately after the fourth deposit is made? Do you think it is enough to purchase a $785 airline ticket to Paris? - (Hints: watch Video 2 of Chapter 5 from 26:22 to 31:27 on D2L)