<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def env_problem(env_problem_name, **kwargs):
 """Get and initialize the `EnvProblem` with the given name and batch size. Args: env_problem_name: string name of the registered env problem. **kwargs: forwarded to env problem's initialize method. Returns: an initialized EnvProblem with the given batch size. """


  ep_cls = Registries.env_problems[env_problem_name]
  ep = ep_cls()
  ep.initialize(**kwargs)
  return ep