Gender of my flock?

[Daniellefox05]

All my chicks are 7 weeks, I’ll include a picture of two of each, hopefully you can help me out with sexing.
Chick 1- Americauna (I think) from Cal Ranch

Chick 2- americauna

Chick 3- olive egger

chick 4- sapphire gem olive egger
Chick 5- silkie

chick 6 - silver laced Wyandotte

 

[flatnhan]

I'm thinking 1, 3, and 4 look like pullets. Silkie looks like a roo. EE, ameraucanas, and olive eggers tend to be a little more difficult to guess though because those pea Combs are so tiny.