Two capacitors C1 = 4 F and C2 = 12 F are connected in series across a

Two capacitors C1 = 4 μF and C2 = 12 μF are connected in series across a 12-V battery. They are carefully disconnected so that they are not discharged and are reconnected to each other with positive plate to positive plate and negative plate to negative plate.

(a) Find the potential difference across each capacitor after they are connected.

(b) Find the initial and final energy stored in the capacitors.