A student (mass-M) stands on the left end of a log (mass=3M) which is floating in the water (which you may treat as a frictionless surface). The student and the log are both initially at rest. Mass=M 03m A COM OM B C D E mass-mass = 3M (a) Draw an arrow on the diagram above at the approximate center of mass of the student-log system. (b) The student walks along the log from point A to point E with constant velocity V. As the student walks to the right, determine the velocity of the log.