a Q(e) (10 points) Imagine that one removes the point charge q from the cavity center out to infinity (say via a tiny hole through the conductor). Find the amount of change in the electrostatic energy of the system. [Hint: Electrostatic energy is uniquely determined by the charge distribution. The change in the electrostatic energy of a process depends on the initial state and the final state of the charge distribution, but is independent of how the charge distribution changes exactly from the initial one to the final one.]