A boiler is fired with a coal having following analysis by percentage weight. The coal is

burned using $40\%$ excess air and produces ash containing $25\%$ unburned carbon.

Determine

i$.$ Volume of air required to burn $1$ kg of coal

ii$.$ Actual volume of air

Percentage composition of dry products of combustion

C $=54,$ H $=4,$ O $=12,$ N $=1,$ S $=4,$ A $=22,$ M $=3.$