1)
Where will there be a path?
1.
Rashi: In the water. Radak - it will be a paved path, as if it was a path for a long time.
2)
Why does it say "li'She'ar Ami"?
1.
Radak (11): Many of them perished in Galus.
3)
What is the comparison to Yetzi'as Mitzrayim?
1.
Radak: Just like there was a path in the Yam Suf, there will be a path in their Pras river.
2.
Malbim: There will be paths in the seas and rivers for the exiles to pass to Eretz Yisrael, just like there were in the Yam Suf and Yarden.
