Comment on the following unusual lottery events, including a probability assessment.
a. On September 11, 2002, the first anniversary of the 9/11 attack on the World Trade Center, the winning number for the New York State-lottery was 911.
b. To play the Maryland Pick 4 lottery, players choose four numbers from the digits 0 to 9. The game is played twice every day, at mid-day and in the evening. In 1999, holiday players who decided to repeat previous winning numbers got lucky. At midday on December 24, the winning numbers were 7535, exactly the same as on the previous evening. And on New Year’s Eve, the evening draw produced the numbers 9521—exactly the same as the previous evening.