Vivaldi you can tell because he had fiery red curly hair.
First one: It would be on Sol
Second one: No. It would be on La. The note is B. And is a Bflat
(I don't know Bass Clef as well. I play Alto Sax, which uses Treble Clef. So please forgive me)
Third one: It would be A flat
Fourth one: It would be C then C flat
(Again, I don't know Bass Clef that well, so don't count on my answers)
Classical Greek choruses consisted of a group of actors who delivered lines in unison. Their lines in the play were usually a commentary on the action/plot of the play, and they acted as a stand-in for the audience.