The dresser has a weight of 80 lb and is pushed along the floor. If the coefficient of static friction at A and B is ? _s = 0.3 and the coefficient of kinetic friction is ? _k =0.2, determine the smallest horizontal force P needed to cause motion. If this force is increased slightly, determine the acceleration of the dresser. Also, what are the normal reactions at A and B when it begins to move?

2.5 ft A -1.5 ft- 1.5 ft-1.5 ft- 5 ft- B -P 4 ft