$$R-L-C$$ circuit shown in figure

If the above step response is to be observed on a non - storage $$CRO,$$ then it would be best have the $${e_i}$$ as a

When subjected to a unit step input, the closed loop control system shown in the figure will have a steady state error of

When subjected to a unit step input, the closed loop control system shown in the figure will have a steady state error of

The block diagram of a closed loop control system is given by figure. The values of $$K$$ and $$P$$ such that the system has a damping ratio of $$0.7$$ and an undamped natural frequency $${\omega _n}$$ of $$5$$ rad/sec, are respectively equal to