According to a report, 61.7% of murders are committed with a firearm. (a) If 400 murders are randomly selected, how many would we expect to be committed with a firearm? (b) Would it be unusual to observe 280 murders by firearm in a random sample of 400 murders? Why? (a) We would expect 246.8 to be committed with a firearm. (b) Choose the correct answer below. O A. No, because 280 is less than u - 20. O B. No, because 280 is greater than u + 20. O C. Yes, because 280 is between u - 20 and u + 20. O D. Yes, because 280 is greater than u + 20. O E. No, because 280 is between u - 20 and u + 20