Friction on an Inclined Plane

“A box is placed on an inclined plane that is tilted at an angle of 25 degrees. Explain how the force of static friction acts on the box and what happens to the box as the angle of the incline increases. A toy car is resting on an incline at an angle of 30 degrees. Describe the forces acting on the car, including the role of static friction, and explain what will occur if the incline angle is increased to 35 degrees.”