Measurement of high resistance by the method of leakage of a condenser

1. The plot of log10⁡(θ0/θ) and t for the circuit in the experiment is:
2. The capacity of the condenser connected to the circuit is of the order of
3. Unit of RC is:
4. The self leakage resistance of the condenser and the resistance of the Ballistic Galvanometer are in: