\fA ball with a mass of 1.26 kg is at rest on the top of the tall box. The ball is pushed off the tall box} bounces on the floor, and lands on top of the lower box. a} What is the initial gravitational potential energy of the ball relative to the floor? {1 mark) b} On its way down to the floor air friction acts on the bali. If the speed of the ball as it strikes the floor is 9.42 mfs, nd the work done by the air friction. (2 marks) c} Using your answer in {b}, determine the force of air friction acting on the bali. {1 mark)