Butane is fed through a hazardous waste incinerator at a rate of $7500$ mole$/$h $(60\backslash$deg F and $1$ atm$)$ and is burned using $37\%$ excess air. Assuming the complete combustion and generation of water and carbon dioxide, $($a$)$ determine the amount of air required in Ib$/$hr and the mass rate of produced gas in Ib$/$hr$.(10$ points$)$