The figure shows the flow of traffic (in vehicles per hour) through a network of streets. x1 t2 xa r3 300 100 r5 (a) Solve this system for x, i-1, 2, ..., 5. (If the system has an infinite number of solutions, express x1, x2, X3, X4, and x5 in terms of the parameters s and t.) (xi, X2, X3, X4, Xs) - (b) Find the traffic flow when x3 -0 and Xs -90. x,x2 x3, X4Xs) (c) Find the traffic flow when X3X 100. (XI, X2, X3, X4, X5) =