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A 4-cylinder in-line engine with turbocharger (supercharged gasoline engine) with a displacement volume of Vh = 2 L is considered, which is operated with different fuel-air mixtures. The air here (for simplification) consists of 20 mol% oxygen 0 2 and 80 mol% nitrogen N2. Given is the following reaction equation for the conversion of 2 moles of fuel (BS), in this case octane C: His : 2CSH 1s + 3002 + 120N2-+ 16CO2 + 18H20 + 50 2+ 120N2 a) [3 P] b) According to this, with which air ratio >- is burned? Give a post- decimal place. Calculate the composition of the fuel-air mixture and the exhaust gas, i.e., all mole fractions on both the reactant and the product side. Indicate four significant digits for each. [4 P]