I hope that you had fun working on finding the harmonies yourself! Now that you have tried it on your own, here are the recordings of the harmonies that I found or made up - trying to keep with a close parallel harmony stack. Have a listen and compare it to what you had come up with. Are they similar? Where are they different? Which one do you like more? It might be that you like the harmony you came up with more! These harmonies represent my version to be in a parallel harmony stack, singing the next available harmony notes and following the melody.