NUS for Electronic Engineering

Hello!

I am a Sri Lankan student sitting for Cambridge A Levels in May 2016.
My subjects are Physics,Mathematics,Further Mathematics, Chemistry and Computer Science.

I plan on sitting for the SAT Reasoning Test and 3 SAT Subject Tests before the end of this year.
I hope to apply to NUS on predicted A Level results and SAT scores for admission in AY 2016/2017

To have a good chance of getting in, practically, what are the minimum requirements?
Is it like 5 A*s or higher?

Also, do they provide admission to students whose results come out after the beginning of their academic year?
(NUS’s academic year starts on 1st of August but CIE Results typically come out around 11-15th of August)

Thanks~