1)
Who is "Mi Bachem ha'Nish'ar"?
1.
Rashi: He was from those exiled, and he is still alive.
2)
What is the significance of seeing Bayis Rishon?
1.
Rashi: One who saw Bayis Rishon, this Bayis is not esteemed in his eyes.
3)
What is the meaning of "ha'Lo Chamohu k'Ayin"?
1.
Rashi: This Bayis is nothing in his eyes. It and nothing are equal. When two consecutive words have the prefix Kaf, they are equated, e.g. "cha'Am ka'Kohen" (Yeshayah 24:2).
2.
Radak, Malbim: It is nothing compared to Bayis Rishon.