Fig. 1. Pool boiling curve of water. (b)] Hot oil at a flow rate of 7.2 kg/s (average cp = 1.92 kJ/kgK) enters an existing counter-flow one to one heat exchanger at 385 K and is cooled by water entering into the shell side of the exchanger at 295 K (under pressure) and flowing at a rate of 4.5 kg/s and the water exit temperature is 345 K. The outside surface area is 15 m2. (Average specific heat of water is 4.187 kJ/kgk) (0) Calculate the exit oil temperature. [7 marks] (ii) Calculate the overall heat transfer coefficient. [7 marks] (iii) Calculate the overall thermal resistance. [3 marks]