Capacitors Questions

A parallel plate capacitor of capacitance $20\mu \text{F}$ is being charged by a voltage source whose potential is changing at the rate of $3\text{V/s}$. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively:

Two identical capacitors $C_1$ and $C_2$ of equal capacitance are connected as shown in the circuit. Terminals $a$ and $b$ of the key $k$ are connected to charge capacitor $C_1$ using a battery of emf $V$ volt. Now disconnecting $a$ and $b$ terminals, terminals $b$ and $c$ are connected. Due to this, what will be the percentage loss of energy?