An industrial engineer is required to compare four alternative power saving devices. She A B D Initial Cost 90 74 15 50 Uniform Annual benefit 24 19 5 14 Each alternative has a 6-year useful life. The business uses an MARR of 12%. The Internal Rate of Return (IRR) of Alternative D is closest to: Note: Write your answer in percentage % form to the nearest one decimal point (ex.: 1 17.2