From the data shown below, determine the economic service life of the asset.Years AW of AW of AW of Retained First Cost Operating Cost Salvage Value 1 $-165,000 $-36,000 $99,000 2 -86,429 -36,000 38,095 3 -60,317 -42,000 18,127 4 -47,321 -43,000 6,464 5 -39,570 -48,000 3,276