i need help with these. its balancing. the blank spaces are where u put the numbers. and the stuff on the sidd is how u show work. i got lost and dont know what comes next

)in the deacon process for the manufacture of chlorine, hcl and o2 react to form cl2 and h2o. sufficient air (21 mole% o2, 79% n2) is fed to provide 35% excess oxygen, and the fractional conversion of hcl is 85%. calculate the mole fractions of the product stream components.