.... the majority of the time I simply didn't read the question properly or didn't think about my answer enough... but the places where i genuinly screwed up are....
1. Things that affect the size of the current:
2. In physics write things to the same d.p or s.g.f as in the question... and ignore the years of intense training your math teacher has put you through to make you write everything to 3s.g.f and degree's to 1 d.p.
DONE!....Well that was easy.