Rules for multiplayer teams

Hey all,

I was wondering how the rules work when playing teams in BNW.

1.) Can teammates establish trade routes with each other? Do these act like trade routes with foreign civilizations or like trade routes among cities of the same civilization?

2.) Can teammates declare friendships and/or engage in research agreements?

3.) Do teammates still not share wonders?

Thanks!

1.) Yes, but only food and production.

2.) DoF yes, RAs, no.

3.) No.