Form 3 llp

Hi,

I have received LLP incorporation certificate. LLP has 2 designated partners and 1 partner.  I need to submit form 3. Now  the third partner also  want to become designated partner. I have 2 queries:-

1. should i apply form 4 first  then submit form 3

2. While attaching the documents in form 3 should I attach initial agreement with 3 designated partners or initial agreement should mention 2 designated and amended agreement should also be filed.

Please help.Thanks.