The following is a set of data from a sample of n = 6: 7 4 9 7 3 12 a. Compute the first quartile (Q1), the third quartile (Q3), and the interquartile range. b. List the five-number summary. c. Construct a boxplot and describe its shape. d. Compare your answer in (c) with that from Problem 3.2 (d) on page 134. Discuss.