Easy one !!!
Well if you wish to slide your branch, your long term goal should be to get above 9 in first two semesters and thus getting a cgpa of above 9 will guarantee you a seat in your desired branch.
Now to get above 9 in both sems you are required to MUG up as much as you can! The more you mug up and vomit the more marks you get!
Thanks for the a2a.