Im given a project to identify the bacteria in my broth sample which contains 3 unknown bacteria.?

I had a similar project. Heres what I did. I went to school, and borrowed a microscope during my study period. Beforehand, I had printed out pictures of the list of bacteria I had. I simpy looked and compared. I had to indetify 5 of them, I I got 4 out of 5 correct, and the 5th one was a "relative" of the one i selected.

If this doesnt work, do the research.