Solve for part a

Problem 4: A motorcyclist performs a somewhat nauseating trick by driving on a vertical circular track (so-called \"loop-the-loop\"). The position of the motorcyclist is show at four positions (A, B, C, D) corresponding to bottom, right, top and left points on the track respectively. The mass of the motorcyclist and his motorcycle together is given as m. The radius of the circular path is given as R. Part (a) Assume that the motorcyclist somehow maintains constant speed V. Draw a careful Free Body Diagram showing all of the forces on system that is the motorcyclist and his motorcycle together when he is in Position C. Calculate the magnitude and direction of each force. Part (b) Assume that the motorcyclist maintains constant speed V. Draw a careful Free Body Diagram showing all of the forces on system that is the motorcyclist and his motorcycle together when he is in Position D. Calculate the magnitude and direction of each force on your FBD. Important hint: Treat the rider and the motorcycle together as a single \"point\" of mass m. Another Important hint: For this problem, the requirement that the motorcycle maintains a constant speed does not mean that the rider is \"coasting\". Indeed, in order to maintain constant speed the rider will need to use use the \"gas\" and the \"brake\" in a particularly skillful way. Another Important Hint: The track is not frictionless. Depending on the specifics of the motion, friction may or may not come into play at any given position on the track