What is the copr of this cycle how fast is exergy destroyed

Question

An ideal vapor compression refrigeration cycle using r134a as the refrigerant is being used to cool a house. It provides 3 refrigeration tons (= 10.5kW) of cooling (heat removal from the house air). The refrigerant in the evaporator operates at 400kPa while in the condenser it is at 1000kPa. Treat the surroundings as a thermal reservoir at 33C and the air in the house as a thermal reservoir at 19C. All reservoirs are at 100kPa.

1. What is the COPr of this cycle?
2. How fast is exergy destroyed (kJ/s) in each process (evaporator, condenser, throttle, compressor)?
3. Which process has the lowest second law eciency?
4. What is the rate of exergy destruction (kJ/s) for the cycle? 

Please provide detailed answer with all calculations