P 9-2 Investment Scenarios (LO 9-3) Arkansas Best Freightways is considering a purchase of three different potential trucks but is uncertain of the cash inflows associated with the following investment scenarios. Required: 1. Calculate the internal rate of return for each of the three possible investments. (Round your answers as a percentage, rounded to 2 decimal places. Negative amounts should be entered using a minus sign. Using the Excel IRR() function, calculate the internal rate of return for each of the three possible investments.) 2. Which investment has the highest internal rate of return