Consider the following shortest-route problem involving seven cities. The distances between the cities are given below. Draw the network model for this. Path Distance 1 to 2 6 1 to 3 10 1 to 4 7 2 to 3 4 2 to 5 5 3 to 4 5 3 to 5 2 3 to 6 4 4 to 6 8 5 to 7 7 6 to 7 5