Draw the graph for the route described in the neighborhood. Find its chromatic number. Find a map coloring that shows the chromatic number.

The neighborhood of Pines West has three cul-de-sacs that meet at an intersection as shown in the figure. A postal delivery person starts at the intersection and visits each house in a cul-de-sac once, returns to the intersection, visits each house in the next cul-de-sac, and so on, returning to the intersection when finished.