18. When conducting an internal rate of return analysis involving multiple, mutually exclusive altenatives, the first step is to: calculate the present worth of each alternative using the MARR. find the least common multiple between all of the alternatives. a. b. rank the alternatives according to decreasing initial investment cost. c. arank the alternatives according to increasing initial investment cost 19. In comparing mutually exclusive alternatives by the internal rate of return method, you should: a. find the IRR of each alternative and pick the one with the highest IRR 6 select the alternative with IRR MARR that has the lowest initial investment cost. select the alternative with the largest initial investment that has been incrementally justified. select the alternative with the highest incremental IRR. c. d. 20. When comparing independent projects by the internal rate of return method, one should: a find the IRR of each project, and pick the ones with the highest IRR(s). 6 select all projects having an overall IRR 2 MARR. c. select the project with an overall IRR MARR that involves the lowest initial investment cost. d. select the project with the largest initial investment that has been incrementally justified