I'm pretty certain that #1 isn't a d'anvers as they should have a rose comb, beard and muffs. Perhaps he is a black tailed buff Japanese? Does look rather roosterish to me.
#2 I wouldn't like to guess gender on
#3 looks girly (but 5 weeks is a little early to be sure)
The barred birds I have no...
The black chick I was referring to is in the photo above, has no white head spot, and is most definitely not a barred rock. Rhode island reds do not have white under feathers, those are red sex links.