Q1) Final Finishing is evaluating two mutually exclusive alternatives for a new piece of equipment, called a "polisher." Each alternative has an expected life of 10 years and no salvage value. Polisher 1 requires an initial investment of $20,000 and provides annual benefits of $4,465. Polisher 2 requires an initial investment of $10,000 and provides annual benefits of $1,770. MARR is 15%/ year. Based on an incremental rate of return analysis, which polisher (if any) should be selected? Show the comparison and use interpolation to estimate rate of return values. (20)