There are two short answer questions in the exam, I will upload the relevant knowledge materials below, it covering a total of two ppt, and please make sure read ppt carefully. The exam will start in 18 hours so please make sure you have enough time to help me answer the question. There is a total of one hour and fifteen minutes to answer. I will send you the questions after the exam starts and then you will send it to me after you have answered the questions. Please note that each question is one page. So please keep in touch with me because it is an online exam.