energy Questions

The energy that will be ideally radiated by a $100\text{kW}$ transmitter in $1\text{hour}$ is:

A capacitor of capacitance $C=900\text{pF}$ is charged fully by $100\text{V}$ battery. Then the battery is disconnected and the capacitor is connected to another uncharged capacitor of capacitance $C=900\text{pF}$. The electrostatic energy stored by the system is: