The carbon footprint of equipment combusting natural gas can be reduced by blending in hydrogen made from renewable resources. An engine combusts $1\mathrm{.}5$kmo$\frac{l}{h}$ of fuel with $5\%$ excess air. The fuel is $80\%C{H}_4$ and $20\%H_2.$ Determine the composition $($mol fractions$)$ of the exhaust from the engine if all fuel is combusted completely and only gases are produced from the combustion.