Owl curation of both this post and its solution
Content type: long, (mostly) technical/expert
Awarded 4.5 out of 6 owls:

Details: the originality owl was not awarded since it requires the math to be explained in a creative/novel way. Concerning citations and sources it would be appropriate to mention if the figures are original work or not. I assume they are but since this was not indicated only half a citation and source owl was awarded.