Which artist invented the collage art form, and in what year? what are artists doing, or what principle are they following when they created a collage?

we could tell by the rotten smell, that something putrid was in our trash can.

including the octave, the answer would 8 notes in a major scale with one note being played twice. ex) c major scale includes: c, d, e, f, g, a, b, c

notice that c is played twice

however, if you were to ask me how many different notes are in a major scale- the answer would be 7.