0.2 Horizontal Position (m) +y -0.2 cn Time (s) You construct a pendulum by tying one end of a string to the ceiling and the other end to a sphere of mass 0.2 kg. The sphere hangs at an equilibrium position marked as 2 in the diagram above on the left. You pull the sphere back to location 1, which is 15" above location 2, then release the sphere from rest. The graph above on the right is of the oscillating sphere's horizontal position as a function of time. A. What is the period of the sphere's oscillation? Briefly explain how you found your answer. B. What is the frequency of the sphere's oscillation? Briefly explain how you found your answer. C. What is the length of the string? Briefly explain how you found your answer. D. Consider position 2 to be where the gravitational potential energy of the sphere-Earth system is zero. How much gravitational potential energy does the sphere-Earth system have at location 1