The difference between equivalent capacitances of two identical capacitors connected in parallel to that in series is $$6 \mu \mathrm{F}$$. The value of capacitance of each capacitor is

The equivalent capacitance between A and B is

A capacitor of capacitance $$C$$ charged by an amount $$Q$$ is connected in parallel with an uncharged capacitor of capacitance $$2 C$$. The final charges on the capacitors are