The Chicago Tribune analyzed 17,713 complaints by citizens against Chicago police officers.

(a) Of the 17,713 complaints against police officers, it was found that 7296 were accompanied by a signed affidavit, which is required by state law for the complaint against the officer to proceed. What is the probability that a randomly selected complaint is accompanied by a signed affidavit?
(b) Of the 7296 complaints with an affidavit, 794 were found to be legitimate. What is the probability that a complaint with an affidavit is found to be legitimate?
(c) Of the 794 complaints with an affidavit that were found to be legitimate, 297 resulted in a suspension of the officer. What is the probability that a legitimate complaint with an affidavit results in the suspension of the officer?
(d) Of the 794 complaints with an affidavit that were found to be legitimate, 12 resulted in the officer being dismissed. Is it unusual for a legitimate complaint with an affidavit to result in the officer being dismissed?