Added some questions in regards to series4.
Added some questions in regards to series4.

UWPCE-PythonCert/IntroPython2016,weidnem/IntroPython2016,weidnem/IntroPython2016,Baumelbi/IntroPython2016,weidnem/IntroPython2016,UWPCE-PythonCert/IntroPython2016,UWPCE-PythonCert/IntroPython2016,Baumelbi/IntroPython2016