A grader will be used to maintain a 7,500 ft haul road. It is estimated that this work will require two passes in second gear and three passes in third gear. Use an efficiency factor of 60%. Grader speeds are given in the chart below. The cost per hour for the grader with an operator is $115 per hour. A. What is the time requirement for this task? 8. What is the total cost for the grader to complete this operation? First Second Third Fourth Forward Gears Maximum travel speed (mph) 2.2 3.0 4.5 6.0