1. Calculate the number of ways that 38 students can be assigned to four seminars of size 10, 12, 10, and 6, respectively.
2. Calculate the number of ways that 65 phone numbers can be distributed to 5 campaign workers if each worker gets the same number of names.
3. One octillion is 1028, or 10 billion billion billion. Is the number of possible deals in bridge greater than or less than one octillion?