In exercises 11–16, find two unit vectors orthogonal given vectors. 11. a = (1,0, 4), b = (1, –4, 2) %3D 12. а %3D (2, —2, 1), Ь %3D (0, 0,-2) 13. a = (2, –1, 0), b = (1, 0, 3) %3D 14. а %3D (0, 2, 1), b = (1,0, -1) 15. a = 3i – j, b = 4+k 16. a = -2i + 3j - 3k, b = 2i – k %3D

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