Answers: "You yourself should try to understand the lesson." and "Before running the marathon, Tom himself ate three plates of pasta."
Explanation: Intensive pronouns are often used to add emphasis to the subject of the sentence, so the answers would be the two sentences above. The reflexive pronouns include myself, yourself, himself, herself, themselves, etc.
Shouldn't the information be base on how many crimes were made, how it increased or decreased over the years and how many of these criminal case were solved.