Vectors u and v are given by: u=5i-4j+pk v=2i+tj-3k (a) Express p in terms of t when u and v are perpendicular. [3] (b) Find the values of p and I when u and v are parallel. [4] (c) Calculate the angle between u and v when p=4 and 1=-1 correct to the nearest degree. [5]

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