[[XST]O_x]

Part 1:
1) hi 10
2) h 10
F) hi 10
3)-5) I have no idea. (I'd be really glad for an explanation though)

Part 2:
6) h, and I believe 1? Or 10, not quite sure.
F) h, 1

Part 3:
7)hi
F)hi, 10