Please explain

Your flight has been delayed: At Denver International Airport, 82% of recent flights have arrived on time. A sample of 12 flights is studied. Round the probabilities to four decimal places. Part 1 of 4 (a) Find the probability that all 12 of the flights were on time. The probability that all 12 of the flights were on time is Part 2 of 4 (b) Find the probability that exactly 10 of the flights were on time. The probability that exactly 10 of the flights were on time is Part 3 of 4 (c) Find the probability that 10 or more of the flights were on time. The probability that 10 or more of the flights were on time is