In POW 2024-06, there was a typo in the assumption. It is now corrected that the assumption holds for \( t \in [-1, 1] \). (Originally, it was for \( t \in \mathbb{R} \).)

POW 2024-05 is still open. (No correct solutions have been submitted.) Anyone who first submits a correct (full) solution will get the full credit.