3. A hockey player has a mass of 115 kg. He is skating at a constant speed. He needs to exert a force of 13.3 N to maintain his constant speed. a) Name the type of friction involved in this case. (1) b) Determine the coefficient of friction between the player's skates and the ice surface. (3) c) The player picks up a stack of pylons, which have a mass of 10.0 kg. Calculate the coefficient of friction in this case. (1)