I Calculation (15 points) A set of data has values that vary from 11.6 to 98. a. If these values are grouped into nine classes, indicate the class boundaries. b. What class interval width did you choose? c. What are the nine class midpoints? II Calculation (15 points) The following is a set of data from a sample of a. Compute the first quartile the third quartile and the interquartile range. b. List the five-number summary. c. Construct a boxplot and describe its shape.