1) Yes. You can also write: "Remains to be written". 2) Yes, although it depends on the context.

Hey Niwantha, 1) Yes, you are correct! It is indeed possible and natural to use the expression ''yet to be written'', though this sort of expression is usually used in formal English (which is the exact case here since the topic at issue is within a report). Also, you should know that sometimes people use this structure to show that they do not expect something to happen, for example: E.g.: ''Your duties in this house are yet to be decided.'' E.g.: ''I have yet to meet a man I can trust.'' E.g.: ''Whether it will be a success has yet to be seen.'' E.g.: ''His victories are yet to be weighed against his failures.'' 2) Yes, it is OK to say like that in the context provided. Hope that helps!