5 Consider the network of one way roads depicted in the figure below where the numbers indicate the number of vehicles per hour 100 50 A 4 equations and 5 variables B 4 equations and 6 variables C 5 equations and 4 variables D 6 equations and 4 variables F None of the showO 200 150 Suppose that you were to set up a system of linear equations to describe this network How many equations would you have to write down and how many variables would be involved