Joshua needed money for some unexpected expenses, so he borrowed $4, 851.15 from a friend and agreed to repay the loan in four equal installments of $1, 400 at the end of each year. The agreement is offering an implied interest rate of Joshua wants to go to business school. While his father will share some of the expenses, Jamie still Joshua 5.22% needs to put the rest on his own. But Jamie has no money saved for it yet. According to his calculations, it will cost him $21, 873 to complete the business program including tuition, cost of living, and other expenses. He has decided to deposit $5,000 at the end of every year in a mutual fund, from which he expects to earn a fixed 6% rate of return. It will take approximately _____ years for Jamie to save enough money to go to business school