Yearbook - numbers

I had to figure out the numbers for the yearbook to figure out which student's work we had and which we didn't for the cover and also the content of the yearbook. This took place on 2 occasions; the first tick representing whether or not we had the files in the Dropbox, the second being a few days later and the dots representing a successfully edited image. Dashes represent a lack of work. In total, we have 9 students who have submitted no work.