M&TSI, COSMOS, RMP, vs. GARCIA

Hello,

I am from Northern CA in Junior in High school. I need some helps to decide what is the best summer program and strategy to accept the program by the order of acceptance. I certainly do not want to offend any admission officers and would like to increase my chance to enter top colleges. Please help me. I am interested in Mechanical engineering or Bioengineering, I like to build robotic VEX and in VEX Worlds three times. I am thinking to found a new VEX club next year and help the club to enter World. I am not sure whether I should consider Research, STEM, or Engineering/Business.

Can I accept MT&SI on by due date Monday and later inform it not to go if RMP accepts me in early May? Will I offend UPenn MTSI admission officers? I am interested to enter UC Berkeley MET program.

As of today close to end of Apr 2018, I am accepted by these 3 weeks M&TSI (due next Monday and pay $7000 including room meal excursion by May 7) and 4 weeks COSMOS (paid deposit, pay $3745 including room meal balance by May 25).
https://fisher.wharton.upenn.edu/summer-mt
https://cosmos-ucop.ucdavis.edu/app/main/page/dates-deadlines

I am in wait-list in the 6 weeks UC Santa Barbara RMP (decision out early May, $10,000 including room meal excursion) and the 6.5 weeks GARCIA (early May, $2100 lab fee, pay extra room meal).
http://www.summer.ucsb.edu/pre-college/research-mentorship-program/application-and-fees
http://www.stonybrook.edu/commcms/garcia/applying/HS%20instruction.html

Your feedbacks are greatly appreciated.

I would say go to COSMOS

bruh what? NONONO m and tsi is better