A domestic refrigerator with both a cold space for fresh food and a freezer is modeled as a 3-T refrigerator. The temperatures of the cold space and the freezer are 5 degrees celcius and -5 degrees celcius, and the ambient is at 20 degrees celcius. If the refrigerator operates continuously, the rate of heat transfer from the cold space is twice that from the freezer, and the power input is 0.25 kW, find the maximum values of the three heat transfer rates.