Suppose that the probability mass function for a discrete random variable X is given by p(x) = cx, x = 1,2,..., 7. Find the value of the cdf F(x) for 4 < x < 5. You will need to find the value of c so that n is a probability mass function)

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A: we have given a graph with edges and its points given as follows:

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Q: USE SALT (a) (c)= 0.9857 2.189 (b) P(0 ≤Z≤ c) = 0.3133 0.89 (c) P(C≤ Z) = 0.1335 1.11

A:

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A: