Oil at 100C is used to heat 2.0 kg/s air in a shell-and-tube heat exchanger. The oil makes six tube passesand the air makes one shell pass. The flow rate of oil is 3.0 kg/s. The air enters at 20C and exits the heat exchanger at80C. The specific heat of the oil is 2100 J/kg K; the specific heat of the air is 1005 J/kg K. If the overall heat transfercoefficient U = 200Wm−2K−1, determine the area required for the heat exchanger.