docs: def process(exam_num: int, time: str, date: str) -> None:
      """Process the exams in the exam_num folder for the time."""
      prefix = Path(f"exams/exam-{exam_num}")
  
      problems = list(prefix.glob(f"exam-{exam_num}-{time}-[0-9].ipynb"))
      problems = sorted(problems, key=lambda k: k.stem[-1])
  
      output_directory = (prefix / "output").resolve()
      fw = FilesWriter(build_directory=str(output_directory))
  
      assignment_zip_name = output_directory / f"exam-{exam_num}-{time}.zip"
      solution_zip_name = output_directory / f"exam-{exam_num}-{time}-soln.zip"
  
      solution_pdfs: List[BytesIO] = []
  
      exam_date_time = datetime.strptime(time + date, "%H%M%d-%b-%Y")
      res: Dict[str, Union[str, int]] = {
          "exam_num": exam_num,
          "time": exam_date_time.strftime("%I:%M %p"),
          "date": exam_date_time.strftime("%b. %d, %Y"),
          "delete_pymarkdown": True,
      }
  
      for problem in problems:
          res["unique_key"] = problem.stem
          problem_fname = str(problem.resolve())
          if problem.stem.endswith("1"):
  
              assignment_nb, _ = sa_nb_exp.from_filename(problem_fname, resources=res)
  
              with ZipFile(assignment_zip_name, mode="a") as zip_file:
                  zip_file.writestr(problem.name, assignment_nb)
          else:
              assignment_nb, _ = prob_nb_exp.from_filename(problem_fname, resources=res)
  
              with ZipFile(assignment_zip_name, mode="a") as zip_file:
                  zip_file.writestr(problem.name, assignment_nb)
  
          solution_pdf, _ = solution_pdf_exp.from_filename(problem_fname, resources=res)
          solution_pdfs.append(BytesIO(solution_pdf))
  
          solution_nb, _ = solution_nb_exp.from_filename(problem_fname, resources=res)
          with ZipFile(solution_zip_name, mode="a") as zip_file:
              zip_file.writestr(problem.name, solution_nb)
  
      resources: Dict[str, Any] = {
          "metadata": {
              "name": f"exam-{exam_num}-{time}-soln",
              "path": str(prefix),
              "modified_date": datetime.today().strftime("%B %d, %Y"),
          },
          "output_extension": ".pdf",
      }
      fw.write(
          combine_pdf_as_bytes(solution_pdfs), resources, f"exam-{exam_num}-{time}-soln"
      )