An SI single cylinder engine operates on Otto cycle was used to drive electrical generator. The engine swept volume is 63Cm³, and the engine uses heptane (C-Hu) as fuel mixed with chemically correct of air (6-1). If the engine runs at 2000rpm and the heating value o the fuel is (40000kJ/kg) and (p air is 1.0 kg/m³). 

Calculate 

1- The air/fuel ratio. 

2- The fuel mass flow rate (m) [kg/min]. 

3- J.the heat released ov combustion in each eyele assume complete combustion.