15\%. Assume that Maisy will continue to replace worn-out tractors with similar ones. These mutually exclusive projects have the following estimated net cash flows. Which tractor should you purchase? a. Tractor B. b. There is not enough information to answer this question. c. Tractor A. d. Either Tractor A or Tractor B would be fine; i.e., You should be indifferent to the two tractors