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