Help chance for the viterbi school of Engineering Thanks a lot!!!

Hi guys:
The following will be my basic background.
TOEFL:99 (23/30/22/24); ACT: 29(27/34/23/32) IB:36/42 (higher level:math, physics and chemistry) or 38/45
The most difficult subjects that our school provides.
Honors: Top Scholar Reward (Grade 10)
World Top 25% Euclid Mathematics Contest (Grade 11)
I know my standard test scores are not strong enough and my IB scores can be better with easier subjects.
Intended major: undeclared engineering(viterbi)

I really did a lot with the activities and attended many clubs about engineering. I also had an intern in a lab working with

language R of computer. (Sorry for not listing them out.)

BTW I got an A and GPA4.0 for the summer program at USC discover engineering and the professor is willing to write a

recommendation letter for me.

I really want to enter USC viterbi school of engineering(My dream). Can anyone chance for me or give me any advice?
I will truly appreciate for any kind of help!!!THX!!!
other school thinking about: UIUC, UCSD, UT Austin,