You will need $80,000 a year, at the end of years 5, 6, 7, from now. To finance those expenses, you plan to save and deposit money in a bank at the end of years 1, 2, 3, and 4. The bank will pay 10% interest, per year, during the next seven years. a. If you plan to deposit equal amount of money at the end of each year for the next four years, what must the annual deposits be? b. Instead of depositing equal amount of money in the bank every year, if you want to increase it by 5% every year, what must be deposits at the end years 1, 2, 3, and 4?