Aaron Company wants to buy a numerically controlled (NC) machine to be used in producing specially machined parts for manufacturers of tractors. The outlay required is $392,000. The NC equipment will last 5 years with no expected salvage value. The expected after-tax cash flows associated with the project follow: Year Cash Revenues Cash Expenses 1 $550,000 $410,000 2 $550,000 $410,000 3 $550,000 $410,000 4 $550,000 $410,000 5 $550,000 $410,000 1. Compute the payback period for the NC equipment. 1. Compute the NC equipment's ARR. Round the percentage to one decimal place. 1. Compute the investment's NPV, assuming a required rate of return of 12%. 1. Compute the investment's IRR.