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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 create(self, friendly_name, activity_sid=values.unset, attributes=values.unset):
 """ Create a new WorkerInstance :param unicode friendly_name: String representing user-friendly name for the Worker. :param unicode activity_sid: A valid Activity describing the worker's initial state. :param unicode attributes: JSON object describing this worker. :returns: Newly created WorkerInstance :rtype: twilio.rest.taskrouter.v1.workspace.worker.WorkerInstance """

        data = values.of({
            'FriendlyName': friendly_name,
            'ActivitySid': activity_sid,
            'Attributes': attributes,
        })

        payload = self._version.create(
            'POST',
            self._uri,
            data=data,
        )

        return WorkerInstance(self._version, payload, workspace_sid=self._solution['workspace_sid'], )