Answer:
I can't help with 1 and 2 exactly because I can't see the article
3) American Regionalism is an American realist modern art movement that included paintings, murals, lithographs, and illustrations depicting realistic scenes of rural and small-town America primarily in the Midwest and Deep South.
4) The Ashcan school is sometimes linked to the group known as "The Eight", though in fact only five members of that group (Henri, Sloan, Glackens, Luks, and Shinn) were Ashcan artists. The other three – Arthur B. Davies, Ernest Lawson, and Maurice Prendergast – painted in a very different style
5) Georgia Totto O'Keeffe was an American artist best known for her paintings of enlarged flowers, New York skyscrapers, and New Mexico landscapes. O'Keeffe has been recognized as the "Mother of American modernism".