For each refrigerator calculate ΔE=QC+Win−QH, where QH is the amount of heat transferred to the hot reservoir, QC is the amount of heat transferred from the cold reservoir, Win is the energy used by the refrigerator. QH, QC, Win are positive quantities. Which, if any, of the refrigerators violate(s) the first law of thermodynamics. For each refrigerator calculate the theoretical maximal coefficient of performance COPmax . For each refrigerator calculate the actual coefficient of performance COP . Which, if any, of the refrigerators violate(s) the second law of thermodynamics.