#### The Data for Display in Detail

Based on what we have done before, we can readily foresee that it
should not be too hard to write a function that `cdrs' down the
lengths' list, looks at each element, determines which length range it
is in, and increments a counter for that range.

However, before beginning to write such a function, we should consider
the advantages of sorting the lengths' list first, so the numbers are
ordered from smallest to largest. First, sorting will make it easier
to count the numbers in each range, since two adjacent numbers will
either be in the same length range or in adjacent ranges. Second, by
inspecting a sorted list, we can discover the highest and lowest
number, and thereby determine the largest and smallest length range
that we will need.