Octane (C8H18) is burned with dry air. The volumetric analysis of the products on a dry basis are: : 10.02 percent CO2 02 : 5.62 percent CO : 0.88 percent N2 Determine : : 83.48 percent (a) the air-fuel ratio (b) the percentage of theoretical air used, (c) the amount of H2O that condenses as the products are cooled to 25°C at 100 kPa.