a three process cycle of an ideal gas (for which Cp = 1.0854 kj/kg-k , cv=1.804 kj/kg-k ) is by isentropic compression 1-2 from 103 KPaa, 27c to 618 KPaa. A constant volume process 2 to 3 and a polythropic process 3 to 1 with n=1.2 completes the cycle. the mass of ideal gas is 0.45 kg/s. Determine the Heat rejected.