8. A random variable X has the following probability distribution: X 0 1 2 3 4 5 6 7 P(X) 0 K 2k 2k 3k k² 2k² 7k²+k Determine (i) k (ii) P(X < 3) (iii) P(X > 6) (iv) P(0 < x < 3)

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