3. Figure 4 represents the trafc entering and leaving an- t other type of roundabout road junction in continental ' Europe. Such roundabouts ensure the continuous smooth ow of trafc at road junctions. Construct lin- minimum flow possible along x,. What are the other ows at that time? (It is not necessary to compute the ii reduced rowechelon form. Use the fact that the trafc ' ow cannot be negative.) Figure 4 Trafc ow in Problem 3