A refrigeration cycle operating at steady state between hot and cold reservoirs at 298 K and 275 K, respectively, removes energy by heat transfer from the cold reservoir (the contents of the refrigerator) at a rate of 600 kW. (a) If the cycle’s coefficient of performance β = 4, determine the power input required, in kW. (b) Determine the minimum theoretical power required, in kW, for a refrigeration cycle operating between these two temperatures