Assume that you must estimate what the future value will be two years from today using the future value of 1 table. (PV of $1, FV of $1, PVA of $1, and FVA of $1 ) Which interest rate column and number-of-periods row do you use when working with the following rates? (Round percentage answers to 2 decimal places.) Ken Francis is offered the possibility of investing $3,940 today; in return, he would receive $12,500 after 15 years. What is the annual rate of interest for this investment? (PV of $1, FV of \$1, PVA of $1, and FVA of $ 1) (Use appropriate factor(s) from the tables provided. Round your "PV of a single amount" to 4 decimal places and percentage answer to the nearest whole number.)