a) There are three work centers (A, B, and C) in Meimay Workshop that can each fit into any of three spaces (1, 2, and 3) in the workshop. The distance from 1-2 is 10 meters, 2-3 is 30 meters, and 1-3 is 40 meters. The matrix of work (trips per day) at the three centers are shown Table 2. Assume that each trip must be a round-trip (from 1 to 2 and back, for example). Find the optimal assignment that minimizes distance traveled. A Table 2 B 20 A B 30 50 [6 Marks]