A gaseous fuel with a volumetric analysis of 60 percent CH4, 30 percent H2, and 10 percent N2 is burned to completion with 130 percent theoretical air. (a) derive the balanced combustion equation (b) determine the air–fuel ratio (c) assume the product is initially in gaseous phase after the combustion, determine the fraction of water vapor that would condense if the product gases were cooled to 20°C at 1 atm