Please Do not use excel

6.2 Assume an alternative has a 3-year life and that you calculated its AW value over its 3-year life cycle. If you were asked to provide the AW value of the alternative for a 4-year study period, is the AW value you calculated for the alternative's 3-year life cycle a valid estimate of the AW over the 4-year study period? Why or why not? 6.3 A machine used to shread cardboard boxes for composting has a first cost of $10,000, an AOC of $7000 per year, a 3-year life, and no apprecia- ble salvage value. Assume you were told that the service provided by the machine will be needed for only 5 years, which entails a repurchase and retention for only 2 years. What salvage value, S is required after 2 years in order to make the 8 6.2 Assume an alternative has a 3-year life and that you calculated its AW value over its 3-year life cycle. If you were asked to provide the AW value of the alternative for a 4-year study period, is the AW value you calculated for the alternative's 3-year life cycle a valid estimate of the AW over the 4-year study period? Why or why not? 6.3 A machine used to shread cardboard boxes for composting has a first cost of $10,000, an AOC of $7000 per year, a 3-year life, and no apprecia- ble salvage value. Assume you were told that the service provided by the machine will be needed for only 5 years, which entails a repurchase and retention for only 2 years. What salvage value, S is required after 2 years in order to make the 8