Methane gas $($CH $4)$ at $25\backslash$deg C$,1$ atm and a volumetric flow rate of $27$ m$3/$h enters a heat$-$treating furnace operating at steady state. The methane burns completely with $140\%$ of theoretical air entering at $127\backslash$deg C$,1$ atm. Products of combustion exit at $427\backslash$deg C$,1$ atm. Determinea. the volumetric flow rate of the air, in m$3/$h$.$Qb$.$ the rate of heat transfer from the furnace, in kJ$/$h$.$