Pretty light brahmas! I have them too My guesses are:
Not sure on first
Pullet in the second picture
Looks like the three light brahmas on the left in the third are roos and the two on the right are girls
Roo for the fourth
I agree with smoochie 1 roo per 10 hens or more...otherwise they will be over bred, barebacked with complete feather loss, and can get mamed. With this group I see 4 roos and 3 hens..You definitely should only have have 1 roo with so little hens.