Consider the following discrete probability distribution.   x −20 −5 10 20 P(X = x) 0.44 0.18   0.09 a. Complete the probability distribution. (Round your answer to 2 decimal places.)   b. What is the probability that the random variable X is positive? (Round your answer to 2 decimal places.)   c. What is the probability that the random variable X is greater than −15? (Round your answer to 2 decimal places.)   d. What is the probability that the random variable X is less than 20? (Round your answer to 2 decimal places.)

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