A1: Ok when your in the room with the pits use expellimerius to knock them out and throw them in the pits. you do this by going up to them when uve knocked them out and there will be a sign on the screen for wat button to press. then proceed up the ramp. you probably have noticed the balls with spikes above the pits, well use the severing charm that cuts stuff to cut them by standing on the ramp and aiming with the back right bumper on the back of the controller and then keep goin up and doin the same till you reach the door. occasionally the little dudes will came up after you but just use expellimerus to knock them out and throw them off the ramp