In details, explain in three paragraph Malcolm and Donblain’s re action to the ordeal?

Sorry this is only a short answer space but I can give you a general comment.

They both feel unsafe. They think that they will be the logical targets of guilt over their father king's murder, 'the near in blood, the nearer bloody. ' People will think they killed King Duncan to further their succession to the throne. Donalbain flees to Ireland and Malcolm flees to England. This temporarily works in Macbeth's favour.