Photograph, Drawing, or Painting?

Determine which one of the following images is a photograph, a drawing, and a painting. Answers after the jump. Don't peek!

1. DRAWING! - after by Paul Cadden (pencil on paper)

2. PAINTING! - Sapphire Lounge II by Dan Witz (oil and mixed media on canvas)

3. SCULPTURE! (I tricked you.) - Tania, cm. 195 by Bruno Walpoth (linden wood and semitransluscent paint)