code: def gaussian_likelihood(x, mu, log_std):
      """
      Args:
          x: Tensor with shape [batch, dim]
          mu: Tensor with shape [batch, dim]
          log_std: Tensor with shape [batch, dim] or [dim]
  
      Returns:
          Tensor with shape [batch]
      """
      #######################
      #                     #
      #   YOUR CODE HERE    #
      #                     #
      #######################
      return tf.constant(0)
  
label_desc: Use image node_id 1 for calling a global function with example usage: gaussian_likelihood(x, mu, log_std) and returns: tf