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