From the data shown, determine the ESL of the asset. (Note: Values in the table are AW values, not individual year-end values.) Years Retained AW of First Cost, $ AW of Salvage Value, $ AW of Operating cost, $ -30,000 1 -160,000 99,000 2. -146,000 -30,000 38,095 3 -150,000 -47,000 18,127 4. -170,000 -51,000 6464 5 -152,000 -45,000 3276 The ESL of the asset is year(s)