60, it expocts it will need to spond $2.0 milson in year 4 replacing faled equipmert. a. What is the IRR of the decision to forge mairitenance of the equipment? b. Does the IRR nule work for this decision? c. For what costs of capital (COC) is forgoing maintenance a good decision? a. What is the IRR of the decision to forge maintonance of the equpment? The IRR of the decision is %. (Round to two decimal places.) b. Does the IRR nule work for this decision? (Select from the drop-down menu.) c. For what costs of capial (COC) is forgoing maintocance a good decision? (seloct from the dropdown menu). For costs of capital that are the