For friend- is this the nub?

This is my friend's ultrasound- 12 weeks, 5 days. I'm posting the photo twice.....once with what I think is the nub circled....and the other without any markings so you can see better. Is this the nub? And if so, what do you think- definite boy?

Attachment 8416

Attachment 8417

It may be but I can't get a good feel for the angle with baby's position.

could be either, im not sure

if that's the nub, I guess I'd guess boy, but I'm not sure that is the nub or that we're seeing all of it.

Maybe boy? but not sure x