4. An insurance claims processing center has six work centers, any of which can be placed into any of six physical departmental locations. Call the centers 1, 2, 3, 4, 5, and 6, and the departments A, B, C, D, E, and F. The current set of assignments is A-3, B-1, C-6, D-2, E- 4, and F-5. The (symmetric) matrix of departmental distances, in meters is 123456 1-530201520 240151010 3 -50205 4 -1035 The matrix of work flow (estimated trips per day) is among centers |AB|C|DE|F| A-15200 300 B20-50016010 C050-300 30 D306020-700 E400 010-60 F003020 50 The firm estimates that each trip costs approximately $4. (1) What is the cost of the current assignment? (2) Try to find one improved assignment and calculate the cost.