The exhaust gas composition obtained from an Orsat apparatus in a test on a spark ignition engine is as follows: CO2 = 11 percent, O2 = 0.4 percent and CO = 9 percent. If he fuel is Iso-Octane (C8 H18). Determine the Air/Fuel ratio of the mixture supplied to the engine. Assume molecular weight of Air = 29, H2 = 2.0 and C = 12.0 Molar ratio of Nitrogen to oxygen in air is 3.76