The population growth and added commercial activity have affected the highway link described in Example 4.2, and improvements planned for this highway are reflected by equations representing the new conditions. The new equations are: T1 = 15 0.004v1 V1= 433 - 130t1 a. Sketch the existing and proposed service and demand functions. b. What are your estimates of the equilibrium time and vehicle flow on the proposed link? c. If the length of this link is 20 mi, what is the average speed over the link