Number of payments.Your grandfather will sell you a piece of beachfront property for $67,500. He says the price is firm whenever you can pay him cash. You know your finances will only allow you to save $6,200 a year and you can make 9% on your investment. If you invest faithfully every year at the end of the year, how long will it take for you to accumulate the necessary $67,500 future cash for the beachfront property?