It was his primary objective to rediscover a sense of the past so therefore it's true.
to name a few famous cubist artist:
pablo picasso
george braque
juan gris
albert gleizes
hope this helps!
I’m pretty sure it’s either 22 or 28. I can’t remember very clearly
This document should help you understand more and explain!
http://file.scirp.org/pdf/CE20120200003_78369835.pdf
Hope this helped!
:)