Which historical figure, according to the novel, translated the Bible into Yoruba?

What literary device is used in the expression "under the world of tears"?

What was the mood at the beginning of the story when the principal walks to the podium?

When Mr. Audu says, "the MD is a witch and wizard rolled into one!", what figure of speech is this?

"You could see a rock carrying three other rocks on its head." What literary technique is being used?