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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 imagetransformer_b10l_dr03_moe_tpu():
 """Moe tpu params."""

  hparams = imagetransformer_b10l_4h_big_uncond_dr03_tpu()
  update_hparams_for_tpu(hparams)
  hparams.batch_size = 4
  hparams.num_heads = 4   # heads are expensive on tpu
  hparams.num_decoder_layers = 10
  hparams.layer_preprocess_sequence = "none"
  hparams.layer_postprocess_sequence = "dan"
  hparams.ffn_layer = "local_moe_tpu"
  return hparams