Isooctane (stoichiometric A/F = 15.13) is supplied to a 4-cylinder SI engine at a flow rate of 2 g/s. Calculate the air flow rate (g/s) for stoichiometric combustion. If the engine operates at 1500 rpm, estimate the mass of fuel (mg) and air (mg) entering each cylinder per cycle. The engine displaced volume is 2.4 liters. What is the volumetric efficiency (%)?