You are given an asset with a 5 year life and salvage values and annual costs given below: Year 0: SV: $100,000 A.C:$ - Year 1: SV: $75,000 A.C:$ 30,000 Year 2: SV: $41,000 A.C:$ 40,000 Year 3: SV: $30,000 A.C:$ 60,000 Year 4: SV: $22,000 A.C:$ 90,000 Year 5: SV: $13,000 A.C:$ 130,000 Asset is depreciated as a 5-years class. Marginal Tax rate= 40% Before tax MARR=12% What is the assets economical after-tax life