I have an essay on Macbeth, the prompt is to figure out who the third murderer is, I don’t know who it is or how to back it up with evidence

Read these sentences from the excerpt: i would sometimes say to them, i wished i could be as free as theywould be when they got to be men. "you will be free as soon as you aretwenty-one, but i am a slave for life! have not l as good a right to befree as you have? how does the use of a rhetorical question advance the author's purposeof showing that all people deserve freedom? it shows the reader that douglass is unsure of hisstatements.it indicates that douglass believes he deserves freedom.oit demonstrates that douglass is questioning his beliefs.it reminds the reader that some questions areunanswerable

Buck did not cry out. he did not check himself, but drove in upon spitz, shoulder to shoulder, so hard that he missed the throat. they rolled over and over in the powdery snow. spitz gained his feet almost as though he had not been overthrown, slashing buck down the shoulder and leaping clear. twice his teeth clipped together, like the steel jaws of a trap, as he backed away for better footing, with lean and lifting lips that writhed and snarled. read this passage. explain what the conflict shows about buck and spitz.

What is the central idea of paragraph 1 of the story?