Avant-garde

  1) Define Avant-garde 2) Define abstraction 3) What is the name of the art style where artists emphasized painterly qualities and strong color over the representational or realistic values retained by Impressionism, intending to shock the viewer visually and psychologically? Who was its leader? 4) What is the style of this painting (Femme ou chapeau (Woman with a Hat)) and who is the artist that created it?