II$)$ Optimal Material Selection for a Heat Exchanger $(50$ Points$)$

Repeat the exercise done in class for identifying the optimal material for the shell$-$and$-$tube

heat exchanger. Using the same group of material that was selected for the case of

minimizing the heat exchanger volume, repeat the problem for the following two cases:

a$)$ Optimal material selection for a heat exchanger with the lowest possible mass

b$)$ Optimal material selection for a heat exchanger with the lowest possible cost

In each case, identify the material index criterion. Then, using the same group of material

that was presented in class, identify which material is the best for the above two cases.