Consider the project balances in the table below for a typical investment project with a service life of four years. An Project Balance - $13,000 - $13,000 - 11,500 FO 0 1 2 3 4 - 2,425 (a) Determine the interest rate used in computing the project balance. The interest rate is %. (Round to the nearest whole number.) - 9,500 - 8,500 100