For each of the following pairs of vectors, find the following: Cl I b a x b the angle between a 8: b 1. a = (-6,5,-4) b=(-1,7,-2) 2. a = (-9,-2,1) b=(-10,2,4l 3. a = (7,2,5) b=(0,2,-3) 4. a = (-5,10,3) b=(-7,6,2) 5. a = (9,-3,4) b=(3.0.5) 6. a = (-7,-10,-8) b=(0,-,8,-7l 7. a = (2,5,2) b=(5,2,-1) 8. a = (2,9,4) b=(-4,2.7l 9. a = (-1,2,6) b=(-5,5,1) 10. a = (-3,-1o,-5) b=(-3,9,-10) 11. a = (2,5,1) b=(~4,-3.0l 12. a = (-4,9,-8) b=(4,1,-8) 13. a =(-5,1,-1o) b=(o,-2,3) 14. a = (-7,0,-2) b=(1o,-6,0) 15. a = (1,2,3) b=l4.5;6)