106. Vehicle Routing Problem: A local pizza shop has received eight orders for delivery. All streets go northtosouth or easttowest so that, distance must be measured rectilinearly. Assume that the pizza shop is located at position (0,0). The coordinates of the houses (ordering pizza) are given below: 1 2 3 4 5 6 7 8 :r-axis 20 40 180 130 1 60 40 30 100 y-axis 90 70 20 100 10 80 50 60 The pizza shop has two delivery boys and each delivery boy can deliver at most ve pizzas. How should the delivery routes be determined so that the total distance travelled (by these two delivery boys) be minimum