You need to find out which set of five galaxies has been allocated to you as follows:
Go to My Grades (which you can find under the More Tools option) on the LEARN home page for Discovering Astronomy and record the number of the Galaxy set.
Once you have the number of your set of galaxies, look up their positions in this table.
Don't lose the number of your set, as you need to include it in your write-up.