Question 9 20 pts Determine the ESL, at i = 10% per year for equipment that has a first cost of $11,000 and the estimated operating costs and year-end salvage values shown below Year M&O Cost, $ Salvage Value, $ 1 -1000 7,000 2 - 1200 5,000 3 - 1300 4,500 4 -2100 2000 1 year 2 years 4 years 3 years