In an engine cycle like the one shown in Figure?

heat is added over a range of temperatures. Explain why even if it were run reversibly, its efficiency would be less than the Carnot limit defined by the high- and low-temperature set points and shown in the figure ( ?C = T₄-T₂)/T₄. Is this in itself a disadvantage of such a cycle?

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3) (2 volume (a) 4) entropy (b) temperature anssaad