A parallel$-$plate vacuum capacitor has $6\mathrm{.}22$ JJ of energy stored in it$.$ The separation between the plates is $3\mathrm{.}90$ mmmm$.$

Part A

If the separation is decreased to $1\mathrm{.}65$ mmmm$,$ what is the energy now stored if the capacitor was disconnected from the potential source before the separation of the plates was changed?

Express your answer in joules.

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Part B

If the separation is decreased to $1\mathrm{.}65$ mmmm$,$ what is the energy now stored if the capacitor remained connected to the potential source while the separation of the plates was changed?

Express your answer in joules.