Suppose you take a sample of stock returns from the Excelsior Corporation and the Adirondack Corporation from the years 2008 to 2012, as shown here (X represents the returns to Excelsior and Y represents the returns to Adirondack): 1) What are the expectation and variance of each random variable. 2) What are the covariance and correlation between the stock returns (use the formula of the population covariance and correlation)?

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