Question: Need help a. Let X be the random variable denoting the age of the music system at failure. X has density function fx (x) ifOSIS4

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a. Let X be the random variable denoting the age of the music system at failure. X has density function fx (x) ifOSIS4 0 otherwise Find the expected value of X, E[X]. 0. Let Y denote the age of the music system at replacement. Let Y=0, if you won't get the replacement. Find the variance of Y, Var(Y)

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