The Scottish Executive, Analytical Services Division Transport Statistics, compiles data on motorcycle casualties. During one year, monthly casualties from motorcycle accidents in Scotland for built-up roads and non€“built-up roads were as follows.

a. Find the mean, median, and mode of the number of motorcycle casualties for built-up roads.
b. Find the mean, median, and mode of the number of motorcycle casualties for non€“built-up roads.
c. If you had a list of only the month of each casualty, what month would be the modal month for each type of road?

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Month Built-up Non built-up 16 January February March 38 38 56 61 73 72 91 69 71 28 19 12 May June 50 90 September 67 51 November 64 December 40 August October