2. Pay special attention to stating your abilities. Don't exaggerate if you don't know. Some candidates in our department said that they had done a lot of experiments such as master cell culture. As a result, as soon as the teacher asked, it was over. If you don't blow, you'll be fine.
3. Some people don't reply to emails, so they can write more.
4. If you really can't do it, take the exam first, and many people contact the tutor directly.