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Consider two random variables X and Y with variances 4 and 9 respectively. a. What is the variance of (X Y) when cor (X, Y)

Consider two random variables X and Y with variances 4 and 9 respectively.

a. What is the variance of (X Y) when cor (X, Y) = 0?

b. What is the variance of (X Y) when cor(X, Y) = 0.5?

c. What is the variance of (X Y) when cor(X, Y) = 0.5?

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