1)
What is the meaning of "Chol Derachai Negdecha"?
1.
Rashi: You know all my ways.
2.
Radak: This is like "b'Chol Derachecha Da'ehu" (Mishlei 3:6); all your deeds should be l'Shem Shamayim (Avos 2:12). Your Pikudim and Edos taught me so.
3.
Malbim: You oversee all my ways with Hashgachah Pratis.