A sample of 30 factory workers were asked as to how long does it take each to travel from home to work on average. The following table provides their answers in minutes. 60 40 83 89 8 7 52 20 25 45 51 58 79 42 56 64 55 54 33 46 87 71 69 66 58 68 31 21 36 35 (a) Construct a stem-and-leaf plot of the data. (b) Produce a frequency distribution table of the data using "0 to less than 10" as the first class. (c) On the graph paper provided, draw a histogram using the same class intervals as in part (b). (d) Draw an ogive (cumulative frequency chart in %) of the data on the graph paper provided.