Question: 10. Given a = [5, 6, 4] and b = [-1,2, 7]: a) Calculate the angle between a and b. b) If c = [2,

10. Given a = [5, 6, 4] and b = [-1,2,

10. Given a = [5, 6, 4] and b = [-1,2, 7]: a) Calculate the angle between a and b. b) If c = [2, -5, t], find t so that a and c are perpendicular

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