The following dry exhaust gas molar analysis results from the combustion of an unknown amount of kerosene (x moles of C₁₀H₂₂) in a compression ignition internal combustion engine: 6.30% CO₂, 9.40% CO, 4.70% C, 4.70% H₂, 1.50% NO, 0.200% CH₄, and 73.2% N₂: Determine

a. The actual molar and mass air/fuel ratios.

b. The percent deficit air used.

c. The volumetric percentage of water vapor in the exhaust gas before it was dried for this analysis.