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Please answer urgently! Part 3: Thinking [13 marks] 20. Given a = [6, -5, 1], b = [-3,5, -1] and c = [8,5, -2], find

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Please answer urgently!

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Part 3: Thinking [13 marks] 20. Given a = [6, -5, 1], b = [-3,5, -1] and c = [8,5, -2], find a ) b . c [2 marks] b) axc [2 marks] 32. Deter c) 0, the angle between a and c [3 marks] d) projab [3 marks] e) Are the vectors a, b and c coplanar? Show your answer algebraically. [3 marks]

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