1.5kW per ton of refrigeration is required to maintain the temperature of -40°C

1.5kW per ton of refrigeration is required to maintain the temperature of -40°C in the refrigerator. If the refrigeration cycle works on carnot cycle' determine the following: (a) C.O.P of the cycle (b) temperature of the sink
(c) Heat rejected to the sink per ton of refrigeration and
(d) heat supplied and the COP, if the cycle is used as a heat pump​