Problem 2 (25 pts) - A pair of large parallel plates with equal and opposite uniform charge density (a) and a gap between them of 10 cm. A small ball with mass 0.0075 kg and charge +8.9 uC hangs from the top (connected by an insulating thread). A) What is the electric potential between the plates such that the thread attached to the ball deflects at an angle of 8 = 25?(9 points) B) Calculate the surface charge density on the parallel plates which creates the electric potential in part (A). (8 points) C) If the electric potential was now changed to 30 volts, what angle, 6, will the ball hang relative to the vertical? (8 points)