A decision is made to give a filename to each related document so that the related
documents are displayed along with the reports in the “Reports” folder when they are
sorted by filenames in alphabetical order. Which of the following is an appropriate
format of filenames for related documents that meets this requirement as well as the
requirements in Table 1? Here, n is a number that represents the sequential number of
the related document, and the number of n’s represents the number of digits.