$($b$)$ The fuel sample has the percentage analysis by mass as follows:$-$

C $=81\%$ H$\_\{2\}=5\%$ O$\_\{2\}=5\%$ Moisture $=2\%$ and Ash $=7\%.$

Calculate theoretical minimum air required for complete combustion of $1$ kg of given fuel. Also calculate the v$$lumetric analysis of dry flue gases, if actual air supplied is $16$ kg per kg of fuel. Assume that $80\%$ of carbon is burnt to CO$2$ and remaining to CO$.$ Hydrogen from fuel burns completely.