Question 10 0 / 10 points An engineer calculated the AW values shown for retaining a presently owned machine additional years. A challenger has an ESL of 7 years with AW-S-86,000 per year. Assuming all future costs remain the same, when should the company purchase the Challenger? The MARR is 12% per year. Assume used machines like the one presently owned will always be available. AW of AWC=-66,000 Years Retained Defender, $/year 1 year -145,000 - SGioco 2 years -96,000 - 86,000 3 years -63,000 -86,000 4 years -39,000 86,000 5 years -49,000 - 86,000