If you need to enter units, use % for percentages, $ for dollar amounts, x for times and years for years. Question 20 (4 points) [Select all relevant] Problems associated with the internal rate of return include: There are no problems associated with the IRR: it is the best of all capital budgeting methods. its inability to handle mutually exclusive projects. the assumption that all cash flows are reinvested at the IRR. the need to reinterpret the decision rule it when dealing with non-normal cash flows (with a single IRR). the possibility of multiple IRRs.