I will answer the last question.

Is it hard to get 3.5 and above??

Simple as ABC and 123.

You just need to study , don' play around. When it is the time to study you study, when it it time for playing, you play.

Don't get these two things mixed up.

Do not study hard.

You must study VERY VERY hard

I dont know.

The thing is if you want to know more about those standards ask your lecturer. It is better.

Don't be afraid to ask them.

Rugi kalau tak tanya.

IT will be tougher when you start studying overseas. Just wait for it.