9. Implied interest rate and period Consider the case or the following annuities, and the need to compute either their expected rate of return or duration Anthony inherited an annuity worth $3,811.62 from his uncle. The annuity will pay him four equal payments of $1,100 at the end of each year. The annuity fund is offering a return of Anthony's friend, Jack, wants to go to business school. While his father will share some of the expenses, Jack still needs to put in the rest on his own, But Jack has no money saved for it yet. According to his calculations, it will cost him $32,406 to complete the business program, including tuition, cost of fiving, and other expenses. He has decided to deposit $4,200 at the end of every year in a mutual fund, from which he expects to earn a fixed 10% rate of return. It will take approximately for Jack to save enough money to go to business school