LC Circuit

If a LC circuit is considered analogous to a harmonically osicallting spring block system, which energy of the LC circuit would be analogous to potential energy and which one analogous to kinetic energy ?

An LC circuit contains a 20mH inductor and a 50muF capacitor with an initial charge of 10mC. The resistance of the circuit be closed at t=0. The time when the total energy shared equally between the inductor and the capacitor is, approximately.

An LC circuit contains a 20 mH inductor and a 50 mu F capacitor with an initial charge of 10 mC. The resistance of the circuit is negligible. Let the instant at which the circuit which is closed be t=0. At what time the energy stored is completely magnetic ?

In a LC circuit parallel combination of inductance of 0.01H and a capacitor of 1muF is connected to a variable frequency alternating current source. Draw a rough sketch of the current variation as the frequency is changed from 1kHz to 3kHz.