A gasoline engine works on an ideal Otto cycle with a compression ratio of 8. Air entering the engine at 101kPa, 27°C, and 1000 kl/kg of heat is transferred during

the heat addition process. Taking into account the variation of specific heats with temperature, determine: а.Pressure and temperature at the end of the isentropic compression process b. Pressure and temperature at the end of the heat addition process C.Net work output of the cycle d. Thermal efficiency