Endgame Puzzle: Black to move and draw

During analysis of a recent game of mine, I found an interesting position, so I decided to make it a puzzle.

The puzzle is in three parts - each part is just 1 move, so move on to the next part if you've found the correct move.

lichess.org/study/H7EiWnVW/onasQGhJ

(and please let me know if I've made any mistakes!)

nice :)