fuel oil with a density of $840$ kg$/$m$3$ is combusted in a burner. Calculate the feed rate of the combustion air $($m$3/$h$)$ and flow rate of flue gases $($m$3/$h$)$

$-0\mathrm{.}05$ m$-\%$ of the carbon was left unburnt

$-$The FFR $($fuel feed rate$)$ is $50$ Liters$/$hour

$-$ The humidity of the combustion air is $0\mathrm{.}75$ vol$-\%$

Mass fractions $(\%)$of the fuel are as follows:

C $=84\mathrm{.}59,$ H $=14\mathrm{.}35,$ S $=0\mathrm{.}05,$ N $=0\mathrm{.}2,$ O $=0,75,$ H$2$O $=0\mathrm{.}05,$ ash $=0\mathrm{.}01$