(c) The selected 3PL company deployed one vehicle, with a maximum capacity of 110 units of standardised carton, to serve the last mile delivery to each zone of Singapore. The following table shows the travel time in minutes between the stores in We st zone, and to/from the DC. Examine the optimal routing options of the We st zone by calculating the delivery time reduction. (Original travel time Updated travel time) Delivery time reduction (%) 9 x 100 Original travel time Delivery time (min) Demand i/j Store 1 Store 2 Store 3 Store 4 (Units) DC (0) 20 41 50 1 5 1 32 55 10 76 2 50 26 23 3 7 60 30 4 65 (l 5 marks)