B. Unix as Programming Language:  12 Questions to Answer
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Here is a Unix programming solution to this problem.  We use exactly six
simple programs, all available on any Unix system:

Simple Tools (programs that perform an action)
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	grep	- find and print  (line oriented)
	cut	- extract fields from lines
	sort	- sorts based on any selection of fields
	uniq	- removes (and/or counts) duplicate lines
	head	- selects first n lines
	wc	- counts chars, words, lines

Combined into Pipelines
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   Demo grep: search for stn=brockton
   Demo cut:  select the time field
   Idea of pipeline: assembly line processing:

      +------------+         +------------+
      |  grep      |= data =>|  cut       |= data => screen
      +----^-------+         +------------+
         _| |_
        [sched]

   pipeline syntax:  grep stn=brockton sched | cut -d";" -f4
 
Now Answer the 12 Questions by using six tools and pipelines