15. A cross country race course consists of three legs shown in the diagram. The magnitudes of the first two legs are da = 4.2 km and de = 5.6 km. The finish line of the course coincides with the starting line. Find the distance and direction of the third leg. 5. 74 m 18 GobS 5.6 km de da 4.2 km Start/Finish 16. The diagram shows two velocity vectors. Using the component method, find the sum of the two vectors. 21 mis 27" N O E vi = 20 m/s 60 15" VI = 30 m/s