An existing robot can be kept if 52 200 is spent now to upgrade it for future service requirements Alternatively, the company can purchase a new robot to replace the old robot. The following estimates have been developed for both the defender and the challenger. The company's before-tax MARR is 12% per year. Based on this information should the existing robot be replaced right now? Assume the robot will be needed for an indefinite period of time Den Current MV $36.000 Purchase price $55.000 Required upgrade $2,200 Installation cost 55 500 Annual expenses 51.700 Annual expenses S900 Remaining useful life 5 years Useful life MV at end of useful life $1400 MV at end of useful life $2.000 Click the icon to view the interest and annuity table for discrete compounding when the MARR is 12% per year 9 years The AW value of the defender is $(Round to the nearest dollar) The AW value of the challenger is $(Round to the nearest dollar) The existing robot be replaced right now