The function f(x) is the probability density function, that describes the random variable travel time X. f(x) = {xe, x >0 0, X ≤0 a.) What is the probability that the travel time is less than 2.5 hours? b.) What is the probability that the travel time is between 1 to 2.5 hours? c.) Find the mean and variance of the given probability density function

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