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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 parse_content_type(headers: MutableMapping) -> Tuple[Optional[str], str]: """ Find content-type and encoding of the response Args: headers: Response headers Returns: :py:class:`tuple` (content-type, encoding) """

    content_type = headers.get("content-type")
    if not content_type:
        return None, "utf-8"
    else:
        type_, parameters = cgi.parse_header(content_type)
        encoding = parameters.get("charset", "utf-8")
        return type_, encoding