Engineering Economics;

The data can be interpreted in the following way: The IRR on the incremental investment between project 4 and project 3 is 13 percent.(a) If the projects are independent, which projects should be undertaken if the MARR is 16 percent? (b) If the projects are mutually exclusive, which project should be undertaken if the MARR is 15 percent? Explain the logic you have used. (c) If the projects are mutually exclusive, which project should be undertaken if the MARR is 17 percent? Explain the logic you have used.

IRR on Overall Investment IRR on Increments of Invest- ment Compared with Project 2 First Cost $100 000 175 000 200 000 250 000 Project 19% 15% 18% 16% 9% 17% 12% 2396 4 17% 13%