please help sexing

Confused first time grower. Have an auto polar express at week 5. Click link for details. Sorry for the relink, nobody replied to my first cry for help. Hahaha.

http://rollitup.org/t/polar-express-wk-5-from-seed.898674/

Sorry for your loss...that be a boy

I'm here for the sexting?

For sure a boy, stem on the preflower means boy, no-stem means girl.