A Network of Capacitors Is Connected Across a Potential Difference $V _ { 0 }$

Short Answer

A network of capacitors is connected across a potential difference $V _ { 0 }$ as shown in the figure.
(a) What should $V _ { 0 }$ be so that the $60.0 - \mu \mathrm { F }$ capacitor will have $18.0 \mu \mathrm { C }$ of charge on each of its plates?
(b) Under the conditions of part (a), how much total energy is stored in this network of capacitors?