A rubber block is at rest on an inclined plane. When the angle of inclination of the plane is increased to 35.7°, the block begins to slide down the incline. Then, when the angle is decreased to 29.3°, the speed of the block is constant. What are the coefficients of static and kinetic friction between the block and the incline? static kinetic

A rubber block is at rest on an inclined plane. When the angle of inclination of the plane is increased to 35.7°, the block begins to slide down the incline. Then, when the angle is decreased to 29.3°, the speed of the block is constant. What are the coefficients of static and kinetic friction between the block and the incline? static kinetic