Can anyone tell gender on these chicks?

[Marshaharrell]

These guys or girls were hatched April 30th and should all be Easter Eggers. I don’t see much of a comb on any of them, but the black one’s tail is definitely different. Any help would be appreciated. Hope they’re clear enough; those little boogers can move!

 

[Ebony Rose]

Need better pictures to feather-sex those, and four weeks old is a bit early, but can sometimes be done if obvious signs are present. Pinking (red) combs or developing waddles at this age would lean strongly towards a conclusion of cockerels; not an absolute, but a strong indicator. Very uniform tail feathers, evenly spaced and well rounded would lean strongly towards a conclusion of pullet; again, not an absolute, but a strong indicator. A strong indicator of male feathering would be spear-like (pointy) unevenly spaced tail feathering.