Answer and Explanation:
a. This phrase means that someone is making a complaint in a very violent way to a person of great importance and power. We can infer that someone is infringing on the authority of a king, since the narrator questions the sanity of a person who has decided to "roar" that is, to speak screaming inside a court.
b. The second sentence shows a narrator disdaining the group of people who want to cause a revolution to help someone. This is because the narrator says that the number of people willing to make the mutiny is very small and will not be able to cause the necessary impact to cause changes and liberations.