the figure shows the flow of traffic (in vehicles per hour) through a network of streets. X1 400 300 X2 X5 (a) Solve this system for x,, 1, 2, s and t.) (X1, X2, X3, X4, X5) = X4 (b) Find the traffic flow when x3 = 0 and xs = 40. (c) Find the traffic flow when x3 = xs = 50. (X1, X2, X3, XAI Xs) = -600 5. (If the system has an infinite number of solutions, express x, X2, X3, X4, and x5 in terms of the parameters 100