What gender are these?

[ImperialTrick]

4 and 5 weeks(white is 5 weeks). The all white is a mystery breed, came in a box of pheonix chicks, the other 4 are orpingtons. I think the all black one is a roo? What do you guys think these are looking like gender wise? Each picture is a different chick

 

[AustralorpsAU]

Number 3 and 5 look like roo's to me. Not sure about the others

 

[elizabethjg]

Five a cockerel, two and three could be cockerels but I'm not sure, just give them more time. Others look like pullets though.

 

[ImperialTrick]

One week later, they grew huge!

 

[ImperialTrick]

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