A single stage impulse generator for producing a standard $1\mathrm{.}2/50$s wave must be constructed for peak output voltage of $250$ kV and an output impulse energy of $7\mathrm{.}5$ kJ$.$ The Generator capacitance is $20$ times the load capacitance. A $5$ kVA, $50$ Hz$,0-230$ V$/0-100$ kV testing transformer is available in the laboratory for impulse generator charging facilitation. Considering the values of a$,$ and a$$ for a $1\mathrm{.}2/50$s wave as $3\mathrm{.}0$ and $0\mathrm{.}70$ respectively; Draw the required efficient impulse generator circuit; and determine the efficiency, values of the charging and impulse circuit components.