Missions & their solution

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*SPOILERS*
So umm the mission named "Grand Finale" (last mission for Rebels, I assume). I'm supposed to find some tapes in Sosa's office? However, all the paintings in the building seem rather... inert. They can't be interacted with. How do I find the tapes?

Btw,
Guy named Costa in Santa Maria has a clue where both Castillo brothers are. The info is part of a mission (the revenge mission for the mechanic). Hope this helps