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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 layer_norm_vars(filters):
 """Create Variables for layer norm."""

  scale = tf.get_variable(
      "layer_norm_scale", [filters], initializer=tf.ones_initializer())
  bias = tf.get_variable(
      "layer_norm_bias", [filters], initializer=tf.zeros_initializer())
  return scale, bias