How did residential life economic/occupational roles and ethnic relationships change during the early years of the 20th century?

Please answer the following questions in a form of an essay: How did residential life, economic/occupational roles and ethnic relationships change during the early years of the 20th century? How did increasing numbers of immigrants influence these attitudes and realities? Did Los Angeles reflect these patterns? What did these patterns look like in southern California in the first 10-20 years of the 20th Century.Please refer to the following book: The Evolution of American Urban History, 8th Ed. New York: Routledge, 2016., Howard P., Judith E. Smith, and Peter C. Baldwin.ISBN-13: 978-0-13-386788-6 or ISBN-10: 0-13-386788-9.Please also refer to the two attachments. Thank you.