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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_storage_class(bucket, retry_params=None, _account_id=None):
 """Returns the storage class for the given bucket. https://cloud.google.com/storage/docs/storage-classes Args: bucket: A Google Cloud Storage bucket of form '/bucket'. retry_params: An api_utils.RetryParams for this call to GCS. If None, the default one is used. _account_id: Internal-use only. Returns: The storage class as a string. Raises: errors.AuthorizationError: if authorization failed. errors.NotFoundError: if the bucket does not exist. """


  return _get_bucket_attribute(bucket,
                               'storageClass',
                               'StorageClass',
                               retry_params=retry_params,
                               _account_id=_account_id)