Use the following videos for you assignment
https://bbhosted.cuny.edu/webapps/blackboard/execute/content/file?cmd=view&content_id=_53734819_1&course_id=_1957067_1&launch_in_new=true
https://bbhosted.cuny.edu/webapps/blackboard/execute/content/file?cmd=view&content_id=_53734820_1&course_id=_1957067_1