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1. Let a = i + 2j - 2k and b = i + 8j + 4k. Find (a) a unit vector in the direction

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1. Let a = i + 2j - 2k and b = i + 8j + 4k. Find (a) a unit vector in the direction of a; (2 marks) (b) a vector of length 8 units in the direction of a; (1 mark) (c) axb; (3 marks) (d) the scalar component d and the vector component v, of a in the direction of b. (4 marks)

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