Yes, another silkie sexing question

[JLoWil]

I got 4 SR silkies at one day old , almost 7 weeks ago. One is a frizzle. The white one and the gray/black/white ones behavior and size has always made me feel they’re roos. Always felt my frizzle is a hen because of her personality and size- her comb has always been a v shape but she doesn’t have a walnut forming at all. (My 4th is uncooperative for a photo. Please confirm if the first two are roos and the frizzle is a hen.) thank you

 

[nuthatched]

First two are cockerels but the one with the "v comb" is a mixed breed and has a strait comb. It might be too early yet.
They can go outside in the coop at 7 weeks.

 

[JLoWil]

We are having a heat wave in california where I live. I have been bringing them outdoors here and there to their outdoor coop/run but didn’t want to kill them by permanently moving them with 100°+ temps for their first week.