[0, 1]. Use this density to find the expectation and the variance of X. 7. Find...

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[0, 1]. Use this density to find the expectation and the variance of X. 7. Find the cumulative distribution function and the density (if it exists) of a random variable X defined on 2 = a) X(u) = w -, b) X(w) = 2w². [0, 1]. Use this density to find the expectation and the variance of X. 7. Find the cumulative distribution function and the density (if it exists) of a random variable X defined on 2 = a) X(u) = w -, b) X(w) = 2w².