Problem 2. An internal combustion Engine uses decane fuel C10H22 which is burned with dry air. The product molar fraction from combustion process analysis are: CO₂ 9.36% CO Oz 0.5% 0.82% Determine (a) the air-fuel ratio on both molar and mass basis, (b) The percent of theoretical air, (c) The equivalence ratio (d) What type of a mixture this engine uses