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Question 4 (20 marks): The random variable X has the Cumulative Distribution Function (CDF) 0 xx) 0, re-write Equation (1), the CDF of the random variable X. Is the random variable X discrete, continuous or mixed random variable? (5 marks) (c) Let a = 2 2(1-e-x); and > = 1. Sketch the CDF.(5 marks) (d) Let a = 0, find the CDF of the random variable X. Is the random variable X discrete, continuous or mixed random variable