Methane is burned with theoretical oxygen in an SSSF process, and the products exit the combustion chamber

Question:

Methane is burned with theoretical oxygen in an SSSF process, and the products exit the combustion chamber at 3200 K, 700 kPa. Calculate the equilibrium composition at this state, assuming that only CO 2, CO, H2O, H2, O2, and OH are present. Combustion: CH4 + 2 O2 CO2 + 2 H2O