EC-4 Computing Growth for a Savings Fund with Periodic Deposits On January 1, you plan to take a trip around the world upon graduation four years from now. Your grandmother wants to deposit sufficient funds for this trip in an investment account for you. On the basis of a budget, you estimate that the trip currently would cost $15,000. Being the generous and sweet lady she is, your grandmother decided to deposit $3,500 in the fund at the end of each of the next four years, starting on December 31, 2015. The account will earn 6 percent annual interest, which will be added to the account at each year-end