1. The cost of consumer purchases such as singlefamily housing, gasoline, Internet services, tax preparation, and hospitalization was provided in the WallStreet Journal. Sample data in NEXUS are the cost of taxreturn preparation by services such as H&R Block. Write down the sorted data and use calculator to answer questions (a), (b), and (c): a) Compute the mean, median, and mode. Comment on the skewness of data. b) Compute the rst and third quartiles. c) Compute and interpret the 83th percentile. d) Give the descriptive statistics of this data set by using excel