input: 
  def construct_student_marks_dict() -> dict:
      """Constructs a dictionary containing student names and their corresponding marks.
      Example:
      >>> construct_student_marks_dict()
      {'John': 90, 'Levi': 85, 'Jill': 95, 'Sara': 75}
      """
  
output:     return {'John': 90, 'Levi': 85, 'Jill': 95, 'Sara': 75}