Answer: 1. Brutus thinks power will change Caesar. 2. He thinks that the people of Rome desire to finish him as well because of a letter that he receives.
Explanation: Brutus claims not to have any reason to finish Caesar off. However, he discreetly implies "reasonable" facts that would make it a good idea. He presumes that, although Caesar hasn't portrayed ambitious behaviors, power could corrupt his mind. Furthermore, due to a letter he receives in which he is accused of sleeping in Rome's reign, he assumes that the people from Rome wants Caesar's life to end as well.