What would happen if at the end of this weekend us, the Phils, and the Brewers are all tied?

Is the division determined first  and then the wildcard? 

Do we have the head to head advantage over the Phils?

Will they make us play for the division and then the loser have to play for the wildcard?

I have asked some cooworkers but no one is sure of how it would work.  I hope it doesn't come to this but as we all know with our Mets anything is possible. Good or Bad !!