Consider the following P-V diagram showing a thermodynamic cyclefor 5 moles of an ideal monatomic gas.

a. For each segment of the cycle, determine if the followingquantities are positive, negative or zero: Q added to the system, Wdone by the system , and ∆Eth (the change in internalenergy of the system). Include a short reason with each answer.
b. This PV diagram actually describes one full cycle of a heatengine. Given that Eb−Ec = 1000 J andPd = 1.5Pc, determine if its efficiency isequal to the theoretical maximum.
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