EASILY DONE.... u can improve in 2 weeks for sure! every question u do (and understand) adds to ur knowledge....
if u do one past paper every morning ull be sweet, if u get stuck on an area go to that chapter in ur text book and read about it, read the examples and then do some easy questions and slowly build up... its great for ur confidence and then once u think ur sweet try tacklin that area in a past paper for sure