An assembly operation at a software company currently requires $93,000 per year in labor costs. A robot can be purchased and installed to automate this operation, and the robot will cost $198,000 with no MV at the end of its 10-year life. The robot, if acquired, will be depreciated using SL depreciation to a terminal BV of zero after 10 years Maintenance and operation expenses f the robot are estimated to be $59,000 per year. The company has an effective income tax rate of 21% nested capital must earn at least 6% after income taxes are taken into account. a. Use the IRR method to determine if the robot is a justifiable investment b. H MACRS (seven-year recovery period) had been used in Part (a), would the after-tax IRR be lower or higher than your answer to Part (a)? Click the icon to wiew the GDS Recovery Rates () for the 7-year property class a. The after-tax IRR under the SL method is [)% (Round to one decimal place ) The robot a justfiable investment b. The after-tax IRA under the MACRS method is % (Round to one decimal place ) For this situation the after-tax IRR under the MACRS method is | than under the SL method