Show that the following distribution is a probability mass function. Construct a plot of the probability mass function and obtain the cumulative probability function. P(X = -2) = 0.2, P(1 < X < 3) = 0.1, P(X = 4) = 0.2, P(5 < X < 5.5) = 0.2, P(X = 6) = 0.15, P(7 < X < 8) = 0.15 %3D

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