Week4: Problem 15 Previous Prob, List Next (1 pt) The rates of on-time flights for commercial jets are continuously tracked by the U.S. Department of Transportation. Recently, Southwest Air had the best rate with 80 % of its flights arriving on time. A test is conducted by randomly selecting 1 1 Southwest flights and observing whether they arrive on time. (a) Find the probability that exactly & flights arrive late. (b) Would it be unusual for Southwest to have 1 1 flights arrive on time? (Enter YES or NO)