So far, plagiarism has been found in 2 written tasks. They will lose points for it. If plagiarism is found in WT 4, the task willl receive a 1.
It is not enough to name your source in your source list. You need to specify which text you have borrowed. In a Type 2 task you can use an in-text reference; in a Type 1 task, you must identify what text you have borrowed in your source list.