5. There have been numerous photographers in the evolution of the medium that can be characterized as “inventors” in terms of process, style, and/or content. Name three photographers that you feel introduced something particularly new to the medium. For each photographer, describe his/her contribution, how you would characterize the appearance of his/her work, and its significance to the defining of the medium (including the principal differences and similarities of his/her photographs to the photographs made by earlier and later photographers).