When a zimmun (rabbotai nevarech, etc.) is done, I have heard that the first three paragraphs should be said aloud by the leader.
(That'd be:
Baruch Ata Adoshem Hazan Et Haolam......Baruch Ata Adoshem Hazan Et Hakol
Nodeh Lecha Adoshem.. bchol ayt uhvechol shahah
VeAl Hakol....Baruch Ata Adoshem Al Haaretz VeAl Hamazon.
)
I am wondering if just the end of the first and third have to be said aloud? I wonder this as the first and third end in actual brachot.
What is the rule for what has to be said aloud?
I notice there are other brachot after that though (e.g. UhVenai yerushalayim....Baruch ata adoshem bonai verachamav yerushalayim amayn) and I haven't seen that said aloud, whereas with the harachamans some do say them aloud.
What is the rule?
Are there differences between ashkenazim and sephardim in this regard? Apparently, sephardim say a bit more aloud like harachamans, but I'd like confirmation of this and preferably a source.