CA final 2nd group in 3 months ?

Dear All,

I have finished studies of 1st group with one revision. I will definitely need 2nd & 3rd revision before exams.

I study 12 hours every day & will need 4 hours for 1st Group revision. Hence, I can devote balance 8 hours every day for 2nd Group. 

Q1. Keeping above in mind, is it possible to study 2nd Group in 3 months (self study) ?

Q2. If I only do practice manuals & past exam questions, is that sufficient to score 45-50 in every subject of 2nd Group ?

I will be honest & tell you that I have NOT opened books/modules of 2nd Group so far...So basically I have to SELF STUDY everything from scratch. My target is to pass 1st Group in any case & 2nd group may be by set off :)

Note - I am a average student who need 3 revisions.

Thanks !