Assume the cycle thermal efficiency is the same as part f) and the volumetric efficiency is 1.7 for a certain operating condition with engine speed at 1500 rpm. each cylinder has one injector and each injector has 6 nozzle holes with a diameter of 200 micrometer. the discharge coefficient of the injector nozzle is 0.75. if the injection pressure is 1200 bar across the injector nozzle, and the injection duration is 8 crank angle degrees. what will 2 be the air-fuel ratio and imep assuming 98% combustion efficiency? fuel density is 800 kg/m3 . heating value of the fuel is = 42500