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