9. Using the rule of 72, approximate the following: a. If land in an area is increasing six percent a year, how long will it take for property values to double? b. If you invest your money for 12 years, at what rate must you invest to double your money? 10. If Jennifer Lee purchases a car for $2,500 and pays $1,000 down and the balance in 24 monthly payments, what will her payments be if the lender requires 12% compounded monthly? 11. If Jeffrey Martin had deposited $4,500 at 10% compounded semiannually and it grew to $15,254.24, how long was it on deposit? 12.Three years from today, Mary Rose plans to take a European vacation that will cost $3,000. She consults you, her banker, about methods of providing for the trip. Among your many plans, you explain to her that she can deposit a single amount today and allow it to collect interest for three years so that the account equals $3,000 in three years. Assuming that your bank pays 6-percent interest rate compounded semiannually, how much must Mary Rose deposit now