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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 retrieve_and_parse_profile(fid: str) -> Optional[ActivitypubProfile]: """ Retrieve the remote fid and return a Profile object. """

    profile = retrieve_and_parse_document(fid)
    if not profile:
        return
    try:
        profile.validate()
    except ValueError as ex:
        logger.warning("retrieve_and_parse_profile - found profile %s but it didn't validate: %s",
                       profile, ex)
        return
    return profile