. Who helps Macbeth plan the murder of King Duncan and why?

Lady Macbeth

Explanation:

This is because she want to be qunn but Macbeth has thought all the reasons not to kill Duncan she calls him a coward and unmanly she accuses him of not being a man.Before that she calls demonic spirits to take her feminine characteristic in order to commit the murder she is seen to be controlling and superior we can also call her a key agent of the murder.She calls Macbeth a coward when he was unable to leave the daggers he doesn't physically kill duncan as she believe he look like her father

i'm not too sure - if you could attach the picture