Answer:
Banquo suspects that Macbeth played ambition to achieve the throne. Lady Macbeth and Macbeth invite Banquo to dinner that evening. Macbeth tells Banquo that he has heard that Malcolm and Donalbain are spreading terrible rumors. When Banquo goes, Macbeth delivers a speech about his fears that Banquo’s children will become future kings. If true, his murderous deeds will have been in vain for his own family, so He convinces two murderers to kill Banquo and his son.