Sir Rodrick was made specialized fitted armor by Jack, but he charged top coin for such a piece.

Who is "he" in this prior sentence?
Jack
The model frowned at her manager because she forgot to call.

Who is "she" in this prior sentence?
her manager
Black Eyed Peas hosted a huge event for the partners of Intel, since they have lots of money to hire them to perform.

Who is "they" in this prior sentence?
the partners of Intel