Facts: A contractor plans to finish grade a haul road for a new research facility construction. Based on the following information, answer the questions below: The haul road area to be graded is 500,000 yd² The contractor plans to use a CAT motor grader with a 12 ft wide blade and 9 ft effectiv width The travel speed of the grader is 4.5 mph on average The grading job requires 3 passes to a smooth surface Assume that the work efficiency is 45 min/hour or 0.75 (Ensure you use the right efficiency factor between the two for the unit to be consistent) Question 1: Estimate the productivity per hour (sa.vd./hr) for the grading job. Question 2: Estimate the total time in hour for completing the grading job.