Chapter $16$ Problem #$42$ of the text:

$($a$)$ Find the equivalent capacitance

between points a and $b$ for the group

of capacitors connected as shown in

Figure P$16\mathrm{.}42$ if $C_1=5\mathrm{.}00F,C_2=$

$10\mathrm{.}00F,$ and $C_3=2\mathrm{.}00F.($b$)$ If

the potential between points a and

$b$ is $60\mathrm{.}0V,$ what charge is stored

on $C_3?$