1)
What is the meaning of "she'Kackah Lo"?
1.
Rashi: It has all this good.
2.
Malbim: Because 'Baneinu ki'Nti'im' (13), we have all these attributes.
2)
Why does it say "she'Hashem Elokeinu"?
1.
Radak: This is why the nation has such success, and it is happy.
2.
Malbim: This is our primary happiness. All these attributes come to us because Hashem goes amidst us. He is Elokeinu, and we are his flock (95:7, 100:3).