Macbeth act 3 scene 5 and 6

Who is Hecate and why is she angry? She’s the goddess of witcraft. She is mad at the witches because they were medding in the business of Macbeth without consulting her.
What is the effect of this scene? They are setting up Macbeth with a false sense of security.
Lennox and other thanes are now suspicous of Macbeth’s role in the deaths of Duncan, the two guards, and Banquo. In this scene, what does Lennox reveal about Macduff? He says that Macduff has gone to England to ask King Edward for help.