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please solve part a only on page by clear handwriting LetZ=X+Y A) Using only the properties ot'the expectations. prove the expression that gives the variance

please solve part a only on page by clear handwriting

LetZ=X+Y A) Using only the properties ot'the expectations. prove the expression that gives the variance of Z as a function of only: of the standard deviation of): from that of Y and the correlation coefcient between these two variables

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