A singer's job= Singing, not giving an IQ test.

Painter's job= To Paint.

Musician's job= To play music.

Sculptor's job= To sculpt.

Its like talking about Apples and Oranges. Most of the world renowned ARTISTS in the world were not the smartest people, or held the higest degree but were the best in their feild of ART. So to even ask this question is asinine.