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The following set of data relates mean word length and recommended age level for a set of children's books Recommended Mean Word Age Length 4 3.5 6 5.5 5 4.6 6 5.0 5.2 6.5 8 6.1 4.9 9 6.7 a. Calculate the correlation coefficient (to two decimal places) using the table and classify the correlation. b. Use the method of least squares/linear regression to determine the equation of the line of best fit. Round all numerical values to two decimal places. c. Use this model to predict the average word length in a book recommended for 12-year-olds. Is this interpolation or extrapolation? Explain