An incinerator produces a dry exit gas of the following Orsat composition measured at 600F and 30 inches of Hg absolute: 4.0% CO2, 26.0% CO, 2.0% CH4, 16.0%H2 and 52.0% N2. A dry natural gas of the following (Orsat) composition: 80.5% CH4, 17.8% C2H6, and 1.7%N2 is used at the rate of 1200ft3/min at 600F and 30 inches of Hg absolute to burn the incineration off gas with air. The final products of combustion analyze on a dry basis: 12.2% CO2, 0.7% CO, 2.4% O2, and 84.7%N2. Calculate (a) the rate of flow in ft3/min of the incinerator exit gas at 600F and 30 inches of Hg absolute on a dry basis, and (b) the rate of air flow in ft3/min, dry, at 800F and 29.6 inches of Hg absolute.