Two kilograms of air within a piston-cylinder assembly executes a Carnot power cycle with maximum and minimum temperatures of 750K and 300K, respectively. The heat transfer to the air during the isothermal expansion is 60 kJ. At the end of the isothermalexpansion, the pressure is 600 kPa and the volume is 0.4 m3. Assuming the ideal gas model for air, determine the thermal efficiency.