A power cycle operating between two reservoirs receives energy QH by heat transfer from a hot reservoir at temperature TH = 2000 K and rejects energy QL by heat transfer to a cold reservoir at TL= 400 K. For each of the following cases determine whether the cycle operates reversibly, irreversibly, or is impossible:(a) QH = 1100 kJ, Wcycle = 900 kJ.(b) QH = 1000 kJ, QL = 200 kJ.(c) Wcycle = 1400 kJ, QL = 600 kJ.(d) ? = 50%