Ass1 week1: http://www.mediafactory.org.au/shijie-luo/2020/03/14/week1/ week2: http://www.mediafactory.org.au/shijie-luo/2020/03/14/week2/ week3: http://www.mediafactory.org.au/shijie-luo/2020/03/18/week3/