$($b$)$ A fuel contains by mass $88\%C$;$8\%H_2$:$1\%S,$ and $3\%$ ash

$($c$)$ Calculate:

i$)$ The stoichiometric air $/$ fuel ratio

ii$)$ The analysis of the dry products by mass if the air supplied is twenty per cent

more than the stoichiometric value

$[8$ marks$]$