The Study of a Woman's Back was created by B. Henri Matisse. He was the painter who drew a lot of sketches and paintings of women's backs because he was fascinated by them. It cannot be any of the other painters because their styles differed so much: Renoir painted realistic paintings, Duchamp was more of a sculptor, and Seurat used the technique of pointillism, all of the characteristics which are not visible in this painting.
the subject is about someone who was dependent on one is now needing help that they didn't expect. they feel like a mess and are begging for someone to support them and help them get back on their feet.
the second question depends on you. look at the song lyrics and see if you can connect to it on a deep level.