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A monatomic ideal gas (1 mole) undergoes this cycle: starting from 1 atm, 0? C, it contracts adiabatically to P = 2 atm, then it expands isothermally, then it contracts isobarically. (a) Sketch the cycle, indicating P, V, and T, for all points. (b) What is the efficiency of this cycle? (c) What is ?S for each leg of the cycle?