(b) The figure below shows a network of one-way streets in Central Suva. On a particular day the trafic flow was measured at each of the intersections.The numbers in the figure represent the average number of vehicles per hour en- tering and leaving each intersection. 300| 1200 800 1300 1400 400 (i) Set up and solve a system of linear equations to find x1, x2, x3, and x4. (ii) Suppose that x = 1250. find the traffic pattern. (iii) If all the directions are reversed in the figure above, discuss what hap- pens.