An air conditioner with refrigerant 134a as the working used is used to keep a room at 23 C by rejecting waste heat to the outdoor air at 35 C. The room gains heat through the walls at a rate of 250 kJ/min and household appliances generate heat amounting to 900 W. The refrigerant enters the compressor at 400 kPa as a saturated vapor at a rate of 80 L/min and leaves at 1200 kPa and 70 C. Find the actual COP of this system. In addition, find the maximum COP possible for this system and the refrigerant volume flow rate into the compressor for this ideal COP.