2. (24 points) a. Calculate the sample covariance. >9 X Y -3 -9 13 9 5 12 b. Calculate the sample correlation. c. Describe in words the information given to us by the sample covariance and by the sample correlation. Explain how the correlation gives us more precise information. d. Explain why the covariance is not a good measure of the strength of the linear relationship between the two variables. e. Sketch a scatterplot of a bivariate dataset with a correlation of 0.9 f. Sketch a scatterplot of a bivariate dataset with a correlation of -0.3