Two capacitors, C$1=2$ uF and C$2=5$ uF$,$ are in parallel with a $40$ V battery. The battery is removed and the opposite signal reinforcement is connected. a$)$ Find the initial and final stored energies for each capacitor

b$)$ Is energy conserved? Justify why?

C$)$Answer again $($a$)$ considering that the capacitors were connected in series during the charge