Direction: Read the given information and answer the following questions.

A car is parked on an incline with a slope angle of 30 degrees to the horizontal. The car has a mass of 1500 kg. The parking brake is applied, and it exerts a force of 9800 N up the incline. Additionally, friction between the tires and the road also exerts a force of 7200 N up the incline. Gravity, acting down the incline due to the car's weight, is also a factor. The car remains stationary under the influence of these forces.