Problem 4) [25 pts] You are using a shell-and-tube heat exchanger (single-pass on both sides) to cool a 100kg/min process stream from 80C to 50C. This process is to be performed using 100kg/min of chilled water supplied at 5C, and the process fluid has water-like thermal properties. If the overall heat transfer coefficient for this process (U) is 700W/m2K, please determine the required heat transfer area if the heat exchanger is being operated: (a) [10 pts ] Countercurrently. (b) [15 pts] Cocurrently