Articles termination

friends plz let me know the following quries:

I had completed 3.5 months of articleship in one of the audit firm now iam willing to take termination my principal agreed now my doubts are:

1) can i take termination as only i completed 3.5 months?

2)if i submit 109 form is it will be sufficient?  or should i specify the reason to icai for my termination.

3) can i join immediately in another audit firm?

4) and if i join should again i submit 102 and 103 forms  again

plz reply frds.