the volume of traffic for a collection of intersections is shown in the figure below. (A graphing calculator is reccomended.) * use 51 as your parameter if needed* 110 95 80 C X1 50 X2 X4 20 X3 B 30 D 60 25 Find all possible values for X1, X2, X3 and X4. (Use 51 as your parameter.) (X1, X2, X3, X4)