The cost of consumer purchases such as single-family housing gasoline. Internet services, tax preparation, and hospitalization were provided in The Wall Street Journal (January 2. 2007). Sample data typical of the cost of tax-return preparation by services such as H&R Block are shown below. I20 230 110 115 160 130 150I 105 195 I55 105 360I 120 120I I40 100 115 180 235 255 a. Show the ordering of the data below (5 points): b. Compute the mean. median. and mode (15 points). c. Compute the first and third quartiles (It? points]. (1. Compute and interpret the 90'\" percentile (5 points)