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If Y is a random variable with density function f(y) = (1/2)e^-|y| where y is for all real numbers, what is E[Y] (expectation of Y)

If Y is a random variable with density function f(y) = (1/2)e^-|y| where y is for all real numbers, what is E[Y] (expectation of Y) and Var[Y] (variance of Y)?

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