1) Consider a heat exchanger operating in co-current mode. Hot oil enters at an inlet temperature of 100C while water enters the heat exchanger at a temperature of 20C. Additional information is shown below. a. Use the technique you were taught in CHEN 3620 to exactly determine the exit temperatures of the two streams. b. Use a guess and check method to determine the exit temperatures of the two streams. Your method should be such that your answers agree with those of 1a) to 4 significant figures. c. Use a numerical method in which the heat exchanger is split into small sections and a constant driving force is assumed for each section to determine the exit temperatures of the two streams. Your method should be such that your answers agree with those of 1a) to 4 significant figures. d. Use your results from 1c) to provide a T-profile plot of this scenario. Heat Exchanger Area=15m2U=300W/(m2K) Oil Stream: 2.85kg/secCP=1.89kJ/(kgK) Water Stream: 0.667kg/secCP=4.18kJ/(kgK)