A California freeway has four lanes in each direction and carries a traffic volume of 4000 veh/hour. There is a 1 mile long section of this freeway that has a 6% upgrade. It is known that on this segment 5% of the traffic is trucks. There are also 5% RVs but no buses. The drivers are all familiar with the road, and the lane width is 11 ft, right shoulder lateral clearance is 4 ft, and there are three interchanges in every three miles of this freeway. Peak-hour factor (PHF) is 0.80. (a) Find the LOS for this segment. [7 points] (b) Suppose that there are an additional 1000 veh/hour of traffic added to this freeway and both the peak hour factor and the percentage of RVs remain the same. What is the maximum percentage of trucks on this freeway such that the LOS of this freeway will not go to F