From Edexcel: Performance roles are a subset of the production jobs; production jobs would consist of: lighting, directing, acting, set design and so on which are the roles you are being asked to assign students to in Task 2. In Task 3 it is asking you to produce a report of the characters which haven't had an actor assigned to them. You could do a performance with just actors but you couldn't have a production without all the other jobs roles filled. I hope this clears it up for you. Kind Regards Definately helpful!