Peter wants to move a cabinet, with a mass of 90 kg ,across the floor. 1.what is the magnitude of static friction force before Peter touches the cabinet?

2.He increases the force to 200N , but tge cabinet does not move. what is the static frictional force?

3. A force of 350N is needed to bring the cabinet into motion. calculate the coefficient of static friction.

4. when Peter continues to push the crate ,he exerts a force of 300N to keep it moving at a constant velocity. calculate the coefficient of kinetic friction.​