A memoir is a biography which is a historical written account based on personal knowledge or special sources. Since it is considered a biography, the point of view that is used in a memoir is first-person point of view. In the first person point of view, the pronouns that can be used are I, me, my, mine, we, us, ours, and our.
The destroying of the ring
The novel’s protagonist. Tom is a mischievous boy with an active imagination who spends most of the novel getting himself, and often his friends, into and out of trouble. Despite his mischief, Tom has a good heart and a strong moral conscience. As the novel progresses, he begins to take more seriously the responsibilities of his role as a leader among his schoolfellows.
"The Judges' combined score moved the competitor to the top of the scoreboard" is the correct response because in this case "Judges" is plural so the apostrophe is outside.