please answer all parts.

8. Application The list below shows the value of purchases, in dollars, by 30 customers at a clothing store. 55.40 48.26 28.31 14.12 88.90 34.45 51.02 71.87 105.12 10.19 74.44 29.05 43.56 90.66 23.00 60.52 43.17 28.49 67.03 16.18 76.05 45.68 22.76 36.73 39.92 112.48 81.21 56.73 47.19 34.45 a) Would you present these data in a grouped or ungrouped format? Explain your choice. b) Create a frequency table and diagram. c) Create a cumulative-frequency diagram. d) How might the store owner use this information in planning sales promotions