A solid fuel containing carbon and hydrogen only is burnt in dry air. The dry flue gas analysis by volume is

$C{O}_{2}11\%,O_2^{T}6\%,N_{2}83\%$

Determine the fuel composition by mass

$70\mathrm{.}5\%$ C$,29\mathrm{.}5\%H$

$75\mathrm{.}60\%$ C$,24\mathrm{.}4\%H$

$86\mathrm{.}6\%C,13\mathrm{.}4\%H$

$60\mathrm{.}50\%$ C$,34\mathrm{.}50\%H$