Defender: . Current trade-in (re-sale) value = $7,000, decreasing at an annual rate of 50% from the previous year's value . O&M = $2,000 in year 1, increasing by $2000 per year o Immediate overhaul required (if kept) = $500 . Maximum possible lifespan is 5 additional years of service (from now) Find the AEC at the ESL. Assume MARR = 11% 6805 - 6845 None of the otherlynswers 6555 - 6595 6478 - 6518 6274 - 6314 6648 - 6688