It can physically show the sum difference between 2 comparisons
The correct answer is 4.
When displaying artworks you need to take into consideration how the elements could possibly damage the art. Artworks are fragile and need to be preserved. Ultraviolet rays from the sun fades paint pigments and the painting will lose it's original colors and vibrancy therefore keeping it out of direct sunlight is best. High temperatures and humidity will damage the painting making it curl or peel or moisture will build up on the surface damaging the paint therefore controlling the temperature and humidity will keep this from happening.
1) 3 1/2 beats
Quarter note, eighth note, quarter note, quarter note
2) 2 beats and 1 rest
Quarter note, quarter note, rest
3) 2 beats, rest, 1 beat
Half note, rest, quarter note
Most likely melancholy, as that was the pint of many 'Blues' songs
