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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 make_response(content, filename=None, content_type="application/pdf"):
 """ Wraps content into HTTP response. If ``filename`` is specified then ``Content-Disposition: attachment`` header is added to the response. Default ``Content-Type`` is ``application/pdf``. :param bytes content: response content :param str filename: optional filename for file download :param str content_type: response content type :rtype: :class:`django.http.HttpResponse` """

    response = HttpResponse(content, content_type=content_type)
    if filename is not None:
        response["Content-Disposition"] = "attachment; %s" % encode_filename(filename)
    return response