The following notes should help.
Careful observation is a basic skill in social research.
Entire courses are geared to teaching and refining this skill. In this assignment, you will get a small taste of how it is done. Both talent and training are required to do well, but there is good reason to believe that, if you are successful in ordinary social relationships, you are likely to be pretty good at observation. If not, you may have a harder time. Your aim in this assignment, as with most social research, is to serve as a research instrument.