1)
What is the correlation between this Pasuk and the previous one?
1.
Or ha'Chayim: The previous Pasuk is referring to Teshuvah that they will perform of their own accord; the current one, to Teshuvah that they will perform due to the Tzaros that will befall them. 1
1
Sha'arei Teshuvah 1:1: Teshuvah is accepted even if one repents due to afflictions, and all the more so if one repents due to fear and love of Hashem .
2)
When is "be'Acharis ha'Yamim" referring to?
3)
Why does the Torah not mention that Hashem will answer their Tefilos and take them out of Galus?