Beautiful chicks. I cant help you with the breeds, at this stage, I'm sure others can.
In my observation,, you seem to have mostly pullets. I'm going by the rounded feather tips.
Your last one, (black) may have some sickle shaped feathers, but I'm not able to see very well. In picture above it, the feathers are rounded.
Chick 1 and 4 look like these chicks, but there are a lot of black mottled chicks, so don't take my word for it. I'm still a newbie, but I like to take a guess.