I suspect the three Cochins are all girls.. But posting here just in case. The two Lavender Orpingtons I am not sure about.
The Orps are approx. 12 weeks and the Cochins are approx. 10 weeks.
I think you have all roos. Except maybe the first cochin, but it has some red wattles so I am not sure.But I would wait a little while longer as I am not that experienced with these breeds.