1)
Who says "Eich Hayu"?
1.
Radak: All who see them will say so, in astonishment.
2)
Why does it say "l'Shamah ch'Raga"?
1.
Malbim: The moment that they die, all their imagined success ceases, and they are finished off via Shedim. Nothing will remain. Their Nefesh will perish when their body dies.
3)
What are "Balahos"?
1.
Rashi: They are Shedim.