B. Unix as Programming Language:  12 Questions to Answer
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  In particular, if you had to answer these 12 questions, how would you
  do it and how long would it take:

    1. When do trains leave from Braintree going to Boston?
    2. What is the time of the earliest train from Ashland to Boston?
    3. How many trains stop at West Medford on a weekday?
    4. List the stations on the Fitchburg line.
    5. List all the lines in the system.
    6. List the train numbers of all trains passing through Beverly Depot.
    7. What station has the most trains on Sunday?
    8. Which line has the most stations?
    9. During what hour does the greatest number of trains arrive at South Station?
    10. When does the last train to Worcester leave Boston?
    11. What is the most common train stop time?
    12. What is the longest train trip (time, not distance) on the system?