You are driving a 2460.0-kg car at a constant speed of 19.0 m/s along an icy, but straight and level road. While approaching a traffic light, it turns red. You slam on the brakes, Your wheels lock, the tires begin skidding, and the car slides to a halt in a distance of 27.0 m. What is the coefficient of sliding friction (µ) between your tires and the icy roadbed?