5.29 A refrigeration cycle operating between two reservoirs receives energy Qc from a cold reservoir at Tc = 275 K and rejects energy QH to a hot reservoir at TH = 315 K. For each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible: (a) Qc = 1000 kJ, Wcycle = 80 kJ. (b) Qc 1200 kJ, QH = 2000 kJ. (c) QH = 1575 kJ, Wcycle = 200 kJ. (d) ẞ = 6.