A voltage is applied to the capacitor network shown in Fig. (a) What is the equivalent capacitance?

A voltage is applied to the capacitor network shown in Fig. (a) What is the equivalent capacitance? [Hint: Assume a potential difference network as shown; write potential differences for various pathways through the network from a to b in terms of the charges on the capacitors and the capacitances. (b) Determine the equivalent capacitance if and