Whats the gender of my chickens?

[jpealpha]

I have 7 chicks that are 9 weeks old. i want to start removing some of the cockerels but im not sure which ones are cockerels and which are pullets.

 

[ramirezframing]

last two lav orps are def roos

 

[chickenlover89]

my guess would be 3, 8, and 9 are cockerels

 

[PekinBantam]

Can we get a horizontal pic of #3's tail?

 

[hdowden]

6 and 7 for surre (last 2 pics)