Using Pearson's Coefficient of Skewness, analyze the data set below: 2, 2, 3, 11, 11, 11, 12, 14, 14, 14, 15, 15, 15, 15, 16, 16, 17, 18, 18, 19, 19, 19, 20 a) Calculate the central tendency measures for this data set (sum, mean, median, mode) b) Calculate the skewness and show the results on a histogram. Is there a right- skewness or a left-skewness? Do the coefficient and histogram display the same outcome?