Help with harmony of Moonlight Sonata by Beethoven Harmony Describe the harmony of this music. Is it in major or minor key? Are there any key changes?...

Help with harmony of Moonlight Sonata by Beethoven

Harmony

Describe the harmony of this music. Is it in major or minor key? Are there any key changes? Do the chords change every bar, every two bars, or longer, and what are the qualities (major, minor, or any other)? Does the chord progression sound static or moving forward? Which instrument(s) mainly provide the harmony (piano, guitar, strings, vocals, etc)? How does the harmonic elements contribute to the meaning or mood of this music?