For the data provided below, find the cold gas efficiency of a gas producer using a dry blast.

$\backslash$table$[[$Coal analysis,$\backslash$table$[[$Gas analysis, orsat,$],[$per cent$]]],[$Per cent as charged,Per cent, dmmf$,C{O}_2,7\mathrm{.}0],[$Moisture$,3\mathrm{.}0,C,85\mathrm{.}2,O_2,0\mathrm{.}7],[$Ash$,14\mathrm{.}7,H,5\mathrm{.}6,CO,20\mathrm{.}3],[$Volatiles$,35\mathrm{.}7,N,2\mathrm{.}8,H_2,12\mathrm{.}5],[\backslash$table$[[$Fixed$],[$Carbon$]],46\mathrm{.}6,S,0\mathrm{.}4,,],[$Total$,100,O,6\mathrm{.}0,C_2{H}_4,0\mathrm{.}5],[,,$Total,$100\mathrm{.}0,C{H}_4,3\mathrm{.}0],[,,,,N_2,56\mathrm{.}0],[,,,,$Total,$100\mathrm{.}0]]$

Clinker analysis, per cent dry: carbon $15\mathrm{.}0,$ ash $85\mathrm{.}0$

Heat of combustion, $-H_c(ca\frac{l}{m}ol)$ : $CO67636$;$H_{2}68317$;$C_2{H}_{4}337234$;$C{H}_{4}212798.$