A closed thermodynamic cycle described by an ellipse is shown on the PV diagram on the right. The maximum pressure of the system is 8.0 x 105 Pa, and the minimum pressure of the system is 4.0 x 10^5 Pa. The maximum volume of the system is 4.0 x 10^-3 m^3 and the minimum volume of the system is 2.0 x 10^-3 m^3 . a) Calculate the magnitude of the total work done by the system in one full cycle. b) Does this thermodynamic cycle describe what happens in an ENGINE or a REFRIDGERATOR/HEAT-PUMP?

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