1)
Why did He say "Yakumu Im Yoshi'ucha"?
1.
Malbim: Since you made the idols, if they have power to save, surely they must save you!
2)
What is the meaning of "Mispar Arecha Hayu Elohecha"?
1.
Rashi: Each city had a different god. Radak - therefore, you cannot deny that you served idolatry.
2.
Malbim: Your idols are in your cities; they are not far away. Therefore, call to them!