Use the incremental IRR to determine the range of discount rates for which each project is optimal to undertake. Note that you should also include the range in which it does not make sense to take either project. Project 0 1 2 IRR X - 20 15 15 % Y - 70 36 54 Y-X - 50 21 39 Use the incremental IRR rule to decide between the two projects. (Select from the drop-down menus and round to two decimal places.)