You have just deposited $10,500 into an account that promises to pay you an annual interest rate of 6.4 percent each year for the next 5 years. You will leave the money invested in the account and 15 years from today, you need to have $29,750 in the account. What annual interest rate must you earn over the last 10 years to accomplish this goal? o 759% 0 6,07% 8.54% 0 6.90% o 700%