// Sections in original order
    testList.forEach(System.out::println);

// Sections sorted by enrollment limit
    testList.stream()
      .sorted(Comparator.comparingInt(SectionInfo::getLimit))
      .forEachOrdered(System.out::println);

// Sum of enrollment limit of all courses
    System.out.println(testList.stream()
      .mapToInt(SectionInfo::getLimit)
      .sum());

// Number of sections in each department
    testList.stream()
      .collect(
          Collectors.groupingBy(
	     SectionInfo::getDepartment,
	     Collectors.counting()))
                 .forEach((s, c) -> System.out.println(s + ": " + c));

// Sum of enrollment limit of all courses by department
    testList.stream()
      .collect(
          Collectors.groupingBy(
	     SectionInfo::getDepartment,
	     Collectors.summingInt(SectionInfo::getLimit)))
	         .forEach((s, c) -> System.out.println(s + ": " + c));


// Sections in original order
    for section_info in test_list:
        print(section_info)

// Sections sorted by enrollment limit
    sorted_list = sorted(test_list, key=lambda x: x.limit)
    print(section_info) for section_info in sorted_list

// Sum of enrollment limit of all courses
    print(sum(section_info.limit for section_info in sorted_list))

// Number of sections in each department
    print("{0}: {1}".format(key, len(list(group))))
       for key, group in groupby(
           sorted(
               sorted_list,
	       key=lambda x: x.department),
	   lambda x: x.department)

// Sum of enrollment limit of all courses by department
    print("{0}: {1}".format(
       key,
       sum(
           section_info.limit for section_info in list(group))))
       for key, group in groupby(
           sorted(
	       sorted_list, key=lambda x: x.department),
       lambda x: x.department)