An extremely light, drivable car with a mass of only 8.75 kg was built in London. Suppose that the wheels of the car are locked, so that the car no longer rolls. If the car is pushed up a 25.0ᵒ slope by an applied force of 83.1 N, the net acceleration of the car is 1.87 m/s². What is the coefficient of kinetic friction between the car and the incline?