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Question 13 (2 points) If A = (1, 2, 4), B' = (3, 4 1), and A + B + C' = (3, 1, -2), what is ~? Explain. Thinking Question 14 (4 points) A triangle has sides formed by the vectors PA = (2, 7, 3) and pg = (6, 2, 2). The point P = (1, 3, 2). Determine the coordinates of the vertices.Question 15 (4 points) If u = 4, v =5, u -v =6, determine u + v (magnitude and direction!). A