A $25\mathrm{.}0F$ capacitor is connected to a $24\mathrm{.}0$ V power supply. Once the capacitor is fully charged the power supply is disconnected so that the charge on the capacitor remains constant. A piece of material having a dielectric constant of $3\mathrm{.}75$ is placed between the plates, completely filling the space between them. By how much did the energy stored in the capacitor change during the insertion?

$-9\mathrm{.}90mJ$

$-5\mathrm{.}28mJ$

$-3\mathrm{.}63mJ$

$-2\mathrm{.}64mJ$

$-1\mathrm{.}90mJ$

$-0\mathrm{.}964mJ$

$0$ mJ

$+0\mathrm{.}964mJ$

$+1\mathrm{.}90mJ$

$+2\mathrm{.}64mJ$

$3\mathrm{.}63$ mJ

$+5\mathrm{.}28mJ$

$+9\mathrm{.}90mJ$