A six-cylinder engine with a volumetric efficiency of 90% and a thermal efficiency of 38% produces 200

Question:

A six-cylinder engine with a volumetric efficiency of 90% and a thermal efficiency of 38% produces 200 kW of power at 3000 rpm. The cylinder bore and stroke are 100 mm and 200 mm respectively. If the condition of air in the intake manifold is 95 kPa and 300 K, determine
(a) The mass flow rate of air in kg/s,
(b) The fuel consumption rate in kg/s and
(c) The specific fuel consumption in kg/kWh. Assume the heating value of the fuel to be 35 MJ/kg of fuel.