3d-art, its so hard, the teacher expects everything to be perfect sucks ngl

Who is depicted in the image below?

Apiece of artwork, either 2-d or 3-d, which is composed by an artist using the elements and principles of art is called a

This nineeteenth-century painting is an excellent example of the use of color theory. the artist used adjacent dots and dashes of different hues that appear to blend and form new hues when viewed from a distance. which painting is it?