13. Choose the best answer. Are the following vectors equivalent? u=initial point (3, -1), terminal point (-1, 2) v=initial point (-1, 3), terminal point (2, -1) Yes Cannot be determined No 14. Choose the best answer. Let u= (4, -7),v= (1, 2), w= (8, 3), c= 2 Find c . (v+w) O (40, 15) O (9, 5) (18, 10) (5, 10) O (12, -4)