You are standing at the rear end of a raft that is 6.0 m long. The raft has a uniform mass of 120 kg and is at rest on a lake. The front end of the raft is 0.50 m from a pier. Assume your mass is 60.0 kg and the lake is a frictionless surface. You now walk to the front of the raft and stop. At the moment you stop walking, how far are you from the end of the pier?