Another Rooster question

Okay, Poultry experts! I have a question about Roos. I have 7 sweet chicks, approximately 5 weeks old. They are a motley crew, a mixed lot from TSC. They were hopping from brooder to brooder when we bought them, so breed is a large question mark until they mature. However, I have a black one with a pronounced comb, which is a bright orange-red color. He has quite the tail compared to the others so I am 99.9% sure he is a roo. I also have a pretty red chicken with a comb, but it is yellow right now. My daughter insisted on naming it Benedict, thinking it was also a roo. I believe it may be a hen, but this is my first time owning chickens. I also have 2 brownish, maybe partridge chickens with combs that are turning orange-red. I am worried that we may have 2 more roos. I am going to get my hubby to take pics whenever it stops raining around here(it is flooding this week). But, based on this info, what is your opinion?
Shelly