What does banquo's ghost in scene 4 represent ?

Im giving 98 point to who answers first and fast i do not need you to give me the answer just some or ideas will be great, i am stuck and not sure what to do you will submit your prewriting documents for the character analysis essay. submit your completed brainstorming and outline graphic organizers. the brainstorming graphic organizer should be complete and show evidence that you have considered several characters and their characteristics for your essay. the outline graphic organizer should demonstrate a plan for writing and include appropriate and sufficient textual support.