Older people were respected in that culture. The leaders were usually older people and were called "elders." The youngest person would be the least likely to lead, and the least important. AT: "the least important" (See: [[rc://en/ta/man/translate/figs-metaphor]])
"For who is more important ... serves?" Jesus uses this question to begin to explain to the apostles who is truly great. AT: "I want you to think about who is greater ... serves." (See: [[rc://en/ta/man/translate/figs-rquestion]])
Jesus uses another question to teach the disciples. AT: "Of course the one who sits at the table is more important than the servant!" (See: [[rc://en/ta/man/translate/figs-rquestion]])
"But I am with you to be a servant" or "But I am with you to show you how a servant acts." The word "yet" is here because there is a contrast between what people would expect Jesus to be like and what he really was like.