Fight scenario

[Scrapper1]

I've never had to deal with an actual fight (although I did eject a kid for throwing a punch once). Someone else asked me about this situation, so I thought I'd throw this out for people to chew on while things are slow.

A6 (bench personnel) becomes involved in an altercation with player B1, which is deemed a fight. Player B2 joins the fight. A7 and A8 leave the bench but do not participate. B6 leaves the bench but does not participate.

So we have 2 players fighting, one bench personnel fighting, and 3 bench personnel not fighting.

What technicals are assessed and how many free throws, if any, are awarded?