A 7 volt battery is connected to a parallel plate capacitor with an initial capacitance of 7 micro-farads without a dielectric. While still connected to the battery, the sheets are moved a factor of 5 times further apart and a dielectric with a dielectric constant of 1.6 is inserted between the sheets. Then, the battery is disconnected, and after the battery is disconnected, the dielectric is removed and the sheets are brought a factor of 3 times closer together. What is the final stored energy in micro-joules in the capacitor?
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