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Exercise: combining filters

Using the supplied files, answer the following:

  1. how many students are enrolled in each course?
  2. what students have only a single name ('.' as firstname)?
  3. what programs are COMP2041 students enrolled in (codes)?
  4. what programs are COMP2041 students enrolled in (names)?
  5. how many students are there from each program?
  6. how many COMP2041 students are first-years?
  7. what are the most common words in the book?