1)
Did he send these people, or to these people?
1.
Ibn Ezra: He sent to them. Malbim - we find Lamed in place of Es, e.g. "Hargu l'Avner."
2)
Why did he send these people?
1.
Rashi: They were "Roshim" (heads of the nation), Gedolim.
3)
What do we learn from "Mevinim"?
1.
Rashi: They were Chachamim.
