Brutus is trying to get across that his actions were honorable, he's trying to explain that he was correct in killing Caesar. That only bad men, (content to by slaves and not true Romans) would be offended.
Fluster: to put into a state of busy confusion
No i’m not because there isn’t anything to do anyways
Answer: determined (verb)
Explanation: you can replace 'determined' with the definiton.
The doctor did some tests and <u>figured out</u> the cause of the patient's pain.