mango4 hi there! ive done a bit of googling for you and have found the course progression map (https://www.monash.edu/students/handbooks/maps/2025/map-s2006.pdf) for this double degree. from looking at that, i believe you only choose a science major and an arts major.
i myself am doing an arts degree, and you would be able to choose either human rights or international relations as your major, and then whichever isn't your major you can study as a minor through the arts elective.
for the other questions, i cannot answer but i hope this helps 🙂
