14. 2.15 Ametek Technical & Industrial Products (ATIP) manufactures brushless blowers for boilers, food service equipment, and fuel cells. The company borrowed $17,000,000 for a plant expansion and repaid the loan in eight annual payments of $2,737,680, with the first payment made 1 year after the company received the money. What annual interest rate did ATIP pay? Develop the answer using

(a) tabulated factor values,

(b) a financial calculator, and

(c) spreadsheet functions.