Consider a concentric tube heat exchanger with hot and cold water inlet temperature of 200 and 35C, respectively. The flow rates of the hot and cold fluids are 42 and 84 kg/h, respectively. Assume the overall heat transfer coefficient is 180 W/m2 K. (A) What is the maximum heat transfer rate that could be achieved for the prescribed inlet conditions? (B) If the exchanger is operated in counterflow with a heat transfer area of 0.33 m2 , determine the outlet fluid temperatures. (C) What is the largest possible heat transfer rate that could be achieved for the prescribed inlet conditions, if the exchanger is operated in parallel flow and is very long? What is the effectiveness of the exchanger in this configuration?