Answer:
Assertive, Concerned, and polite - Mayor
Logical, demanding, and persuasive - Local Newspaper
Emotional, Honest, and Open - Uncle
Step-by-step explanation:
Martin needs to show that he is concerned, he needs to show that he's onto something, but he needs to be polite about it to the mayor.
Martin needs to think logically to gain peoples attention and not sound ridiculous, he must be demanding to gain the mayors attention to let him know that this is a pressing matter, and he needs to persuade the mayor to do something about it.
To your uncle, you must have a lot of emotion and you should be honest with him, it would keep his mind open and he will think about it more. Being open about the situation would also make him realize that you're right and he will be more willing to do what you ask.