Question 5: 20 points Consider the layout below. Initial layout AB D Department A and Care represented by 1'X2' rectangles. Whereas, departments B and D are 1' X 1' squares. The flow-between and unit costs matrices are given below. Flow-Between Matrix B C D 7. 0 3 5 0 5 Unit Cost Matrix A B A 2 B 2. 0 1 D 3 0 0 2 Lola 0 a) List all the department pairs that CRAFT would consider exhanging. Do not compute the associated costs, just write down the possible exchance pairs. b) Compute the initial layout cost. c) Compute the actual cost of exchanging departments B and C