Question: 7. Given a = [5, -2, 1] and b = [-3, 4, 5]: a) Calculate the angle between a and b. [3] b) If c

7. Given a = [5, -2, 1] and b = [-3,

7. Given a = [5, -2, 1] and b = [-3, 4, 5]: a) Calculate the angle between a and b. [3] b) If c = [5, 6, t], find t so that a and c are perpendicular. [3]

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