6. An SI. six-liter, V8 race car engine operates at WOT on a four-stroke cycle at 6000 RPM using stoichiometric nitromethane. Fuel enters the engine at a rate of 0.198 kg/sec and combustion efficiency is 99%. Calculate: (a) Volumetric efficiency of engine. [%] (b) Flow rate of air into engine. [kg/sec] (c) Heat added per cycle per cylinder. [kJ] (d) Chemical energy from unbumed fuel in the exhaust. [kW]