input: 
  def construct_student_marks_dictionary() -> dict:
      """ Construct a python dictionary containing student names and marks as key-value pairs.
      >>> construct_student_marks_dictionary()
      {'John': 90, 'Levi': 85, 'Jill': 95, 'Sara': 75}
      """
      student_marks = {
          "John": 90,
          "Levi": 85,
          "Jill": 95,
          "Sara": 75
      }
      return student_marks
  
output:     return student_marks