1)
Why is this written here?
1.
Rashi: The Navi arranges the miracles done through Elisha.
2.
Rashi citing Sotah 47a: Gechazi used to expel Talmidim from in front of Elisha. After Gechazi was punished [and left], many Talmidim came, and they were cramped. Malbim - Elisha was in Shomron. Life in big cities is difficult. They do not get their residence and their needs.