A girl is pulling a 6.0 kg sled (which was initially at rest) to the right along a horizontal, frictionless surface, applying a constant horizontal force of 12 N. (a) Draw a diagram of the forces acting on the sled. (1 mark) (b) Find the speed of the sled after it has moved 3.0 m. (2 marks) (c) Suppose the magnitude of the force acting on the sled is doubled. How far does the sled move now if it still accelerates to the same final speed? (2 marks)