1)
Why did Hashem command Yirmeyah to speak to them, since they will not listen?
1.
Radak: Even so, he should warn them.
2)
When should Yirmeyah call to them?
1.
Malbim: After you speak to them and they do not listen, call them to come close.
3)
What is "Ya'anuchah" written with Chaf Hei at the end, and not a final Chaf?
1.
Radak: We find like this - "va'Chasidecha Yevarechuchah" (Tehilim 145:10) and similar verses.