In the downtown section of a certain city, two sets of one-way streets intersect as shown. The average hourly volume of traffic entering and leaving this section during rush hour is given in the diagram. a)Determine the general flow of traffic for this network. Show all row operations used. b)Solve for the specific case where the amount of traffic between intersections Cand D average to 200 automobiles per hour. 450 310 610 X1 640 A X2 X4 520 X3 600 D 480 390