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3. Write a java code to find the covariance of the given data Hints: 4. Write required java code(s) to demonstrate a Calculator package which

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3. Write a java code to find the covariance of the given data Hints: 4. Write required java code(s) to demonstrate a "Calculator" package which demonstrate the basic functions of the calculator (Addition, Subtraction, Multiplication and Division). Also write a java code to use that package

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