For the capacitor network shown, Find:

$($a$)$ The total energy stored in the network.

$($b$)$ The energy stored at $C_2.$

Note: $V_{ab}=12V,C_1=8\mathrm{.}6F,C_2=4\mathrm{.}8F$

$C_3=3\mathrm{.}5F_1,C_4=6\mathrm{.}2F,C_5=11\mathrm{.}8F$

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