What is a internal or external conflict in the play or between walter/ beneatha

Walter's inner conflict is the crushing sense of futility he feels about not being able to provide for his family. He wants a quick fix to his problems, investing in the liquor store, but knows in his heart it is the wrong decision. Beneatha Younger is Walter's 20-year-old sister, a college student who invades the Younger household with her modern ideas and philosophies on race, class, and religion. She is a handsome intellectual who has worked hard to refine her speech. She wants to help her family but is conflicted because she also wants to attend university. Both have an external conflict with poverty and being black in America.