It's Day 39, and I Want to Quit

This is the season finale of Survivor: Mauritius.

Challenges
Immunity Challenge (Day 37): Fallen Comrades The remaining contestants answer questions about the eliminated contestants. The castaway to score the most questions correctly or the one who correctly answers ten questions first wins.

Immunity Challenge (Day 38): Final Four-titude The castaways must race up a series of steps to the top of a tower and retrieve a key. Once retrieved, they must race down a large slide to the bottom of the tower and place their key at their puzzle station, and head back for the next one. Once all the keys are collected, the castaways must use the keys to unlock bags of puzzle pieces, using those pieces to build a vertical puzzle. The first person to finish the puzzle wins.