The accompanying data are 45 commute times to work in minutes for workers of age 16 or older in Chicago. Construct a frequency distribution. Use a class width of 15 minutes and begin with a lower class limit of 0 minutes. Do the data amounts appear to have a normal distribution? Examine the data and identify anything appearing to be unique.

60 15 35 15 10 15 15 12 30 30 45 30 20 20 15 25 45 60 28 30 30 60 45 30 12 45 20 10 15 45 45 35 60 20 20 20 30 4 80 45 30 60 45 25 30