Hydrogen-free carbon in the form of coke is burned (a) with complete combustion

Hydrogen-free carbon in the form of coke is burned (a) with complete combustion using theoretical air,
(b) with complete combustion using 50% excess air, or (c) using 50% excess air but with 10% of the
carbon burning to CO only. In each case calculate the gas analysis that will be found by testing the flue
gases on a dry basis.