1)
Why does it say "ha'Nakel Lechto b'Chatas Yaravam"?
1.
Radak: His actions showed that Chatas Yaravam (the calves) was a small matter for him.
2)
Why does it say "va'Yelech va'Ya'avod"?
1.
Rashi: He went to Tzidon (his wife's native country) to serve their idolatry Ba'al.
3)
Did he serve only Ba'al?
1.
Rashi: He served it in addition to Yaravam's calves.
2.
Malbim: Refer to 16:33:2:1.
4)
Why does it specify that he bowed to it?
1.
Radak: He accepted it for a god.