1-Consider the car-caravan analogy from Section 4 in Chapter 1. In this problem, assume a propagation speed of 60 km/hr and that each toll booth takes 12 seconds to service a car. a) (7 points) Suppose the caravan of 10 cars begins immediately in front of the first toll booth, travels 40 km to a second toll booth, then another 40 km to a third toll booth, and finally stops immediately after the third tool booth. Thus, they travel a total of 80 km. What is the total end- to-end delay? b) (3 points) Where is the last car in the caravan after 30 minutes? Your answer must include a distance/specific location, and not only a relative direction