A Carnot cycle heat engine using 1 kg of air has the following conditions: Heat addition beginning at 15 MPa and 1200 K and continuing until the pressure is 10 MPa; isothermal compression from 100kPa and 300 K and continuing until the pressure is 150kPa. Assuming constant specific heats at 750 K, Determine:
a. The heat transfer into the cycle in kJ
b. The heat trandfer from the cycle in kJ
c. The work for each of the processes in kJ
d. The cycle efficiency