Help needed

Hi all. Freinds I need your help in solving my 3 queries.

1. In Surbhi Bansal's book there are 2 S.A. given Viz. Old & Revised. So my question is should I need to study both of them or only revised?

2. In the topic of Transportation if in a solution there are 2 loops then how to show them differently? i.e. whether both are to be shown by black & blue pen or both by pencil only?

3. If I do practice manual only then will it cover compilation & suggested?

Regards

Aditya.