Hello!
I'd like to know if the following sentences are correct

:
1)My watch is five minutes ahead
2) My watch is five minutes forward
3) My watch is five minutes fast
4) My watch is five minutes back
5) My watch is five minutes slow
6) My watch is five minurtes late
If more than one option s acceptable is there any difference in meaning? I mean my watch is wrong or I set it that way......
Thanks a lot
Rip