A truck travels on a level roadway. After traveling initially at 65 mph, the brakes are applied so all tires are on the verge of skidding. If it takes 500 ft to come to a complete stop, what is the coefficient of static friction between the tires and the road? For the same scenario but on a 10 degree downhill slope, what distance is required to come to a stop? Use the value of mu you calculated in part a.