Please solve the following question

This is a question in Game Theory about Congestion networks

Exercise 8.] Consider the following two congestion networks with the indicated cost functions on their edges for a ow x on the respective edge, so for example 50 l x is short for C(x) = 50 + x. Note that different edges may have different ows x depending on the chosen routes by the users. Suppose there are 6 users who want to travel from 0 to d. (a) Find the equilibrium ow in the left network. (b) Starting from the equilibrium ow in (a), improve the route of one user at a time until you nd an equilibrium ow in (b). Compare the equilibrium costs in both networks