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22. A manufacturer of automated optical inspection devices is deciding on a project to increase the productivity of the manufacturing processes. The estimated costs for the two feasible alternatives being compared are shown below. Use the internal rate of return (IRR) method to determine which alternative should be selected if the analysis period is 8 years and the company's MARR is 4% per year. Alternative M N Initial costs $30,000 $45,000 Net annual cash flow $4,500 $7,000 8 8 Life in years (a) IRR of base alternative (b) IRR of incremental cash flow (c) Choose Alternative