What are "good practices" for writing?

Which three sentences in this excerpt from arthur conan doyle's "the contest" suggest that the author's tone is mocking?

Urgently need to do with 1-20. you very much!

For the strangers that came to town you will write a paragraph explaining the main conflict. you will also compare and contrast the perspectives of the protagonist and antagonist. view the grading rubric as you complete your assignment. this is your guide to a super submission. for this assignment, use the novel or short story you chose to read for module 5. write a paragraph explaining the conflict and the perspectives of the protagonist and antagonist. review the example in the lesson. be sure your paragraph mentions the title and author in the first sentence briefly summarizes the plot identifies the main conflict describes the protagonist’s perspective on the conflict provides a line of dialogue that the protagonist says to support your idea (text support) describes the antagonist’s perspective of the conflict provide a line of dialogue that the antagonist says to support your idea (text support) includes a closing line to summarize the character’s views uses correct grammar, punctuation, and spelling