If a Sephardi davens in a Ashkenazi Shacharit minyan on a Monday or Thursday (longer tachnun), what should he do for tachnun?

What does a girl in seminary in israel to about Chanukah lighting?

Hi Rabbi, Can a Sephardic shul allow an Ashkenaz person to be Hazzan since he’s in his year of avelut? He will be praying the ashkenaz nusach