The arguments to the withColumn method need to be reordered.

The arguments to the withColumn method need to be reordered and the copy() operator should be appended to the code block to ensure a copy is returned.

The copy() operator should be appended to the code block to ensure a copy is returned.

Each column name needs to be wrapped in the col() method and method withColumn should be replaced by method withColumnRenamed.

The method withColumn should be replaced by method withColumnRenamed and the arguments to the method need to be reordered.