2 looks like it might be a girl. Give it a few more days and itll become more evident.
are they under 12/12?
You need extreme closeups of the area where the side branch intersects with the main stem. Top 2 nodes.
4 looked like a girl as I saw what appeared to be to pistils or 'hairs' coming out of a female flower. When you have 2 whitish hairs coming out if a cone shaped thing at the place where the main stem and side branch meet, you gotta girl.
Preflowers are visible on a lot of plants at 5 or more weeks in veg. Look on top 2 nodes and the males are more rounded little bumps and the females are more pointed like a cone shape. 1 or 2 mm long, these preflowers are tiny. I use a good loupe.