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Two large parallel conducting plates are separated by a small distance 4x. The two plates are...

Two large parallel conducting plates are separated by a small distance 4x. The two plates are grounded. Charges Q and -Q are placed at distances x and 3x relative to one plate. a) How much energy is required to remove the two charges from between the plates and infinitely apart (from each other)? b) What is the force (magnitude and direction) on each charge?

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