Arcata, on the northern coast of California, is a small college town with a central plaza. Figure 1 shows the streets surrounding and adjacent to the town's central plaza. As indicated by the arrows,...

Extracted text: Arcata, on the northern coast of California, is a small college town with a central plaza. Figure 1 shows the streets surrounding and adjacent to the town's central plaza. As indicated by the arrows, all streets in the vicinity of the plaza are one-way. H Street G Street N A 100 100 55 A 30 9th St. Arcata Plaza 8th St. 75 X3 30 95 75 Figure 1: Traffic volumes around the Arcata plaza. Traffic flows north and south on G and H streets, respectively, and east and west on 8th and 9th streets, respectively. The number of cars flowing on and off the plaza during a typical 15-minute period on a Saturday morning is also shown. Find a1, 2, 23, and #4, the volume of traffic along each side of the plaza.