(5 marks) An air conditioning A/C unit is used to cool a class room that contains 40 students and maintains it at 20C when the outdoor air temperature is at 32C. The amount of heat dissipated from each student is assumed to be 360 kJ/h. The room is estimated to gain heat through walls and windows at a rate of 15,000 kJ/h. If the lights of this room release 2 KJ/s and the COP of the A/C unit is 2.5, determine: (a) The cooling load of the class room (b) The electric power required to run this A/C unit. (5 marks) (c) If the price of electricity is $0.5/kWh and the A/C operates 5 hours a day what is the 30 days bill to operate this A/C unit. (5 marks) (d) Assuming this A/C operates in reversible cycle what is its ideal COP. (5 marks) 32 C 20C W A/C