What are my safeties, targets, and reaches?

I need help finding inspo on what schools should be safeties, targets and reaches! My stats are below

High School Junior (Class of 2019)
PSAT: 1510 (10/2017) → made the semifinals for NMS
ACT: 36 (36,36,36,35) writing: 11
APs: bio 5, world history 5 (I am taking chem, BC calc and USH this year)
SAT II: only bio 740 (taking math II chem and maybe USH)

Courseload
freshman year: world history A, english A-, honors spanish A, honors math A+, science A (4.00 UW GPA)
sophomore year: AP world A- , AP bio A- , honors spanish A, honors english A-, honors precalc A (3.80 UW GPA)
junior year (so far): APUSH A, AP chem A+, honors spanish A, honors english A-, AP BC calc B (it’s trash i know)

thank you!

If you’re a junior, how do you already know you’re a semifinalist?

they release projected cutoffs and I am well over the number needed for the state that I live in

What state are you in, what do you want to major in, and what kind of school are you looking for?

hmm good questions I’m living in MA, i want to major in either premed or something chem related, I think i would like to stay in the northeast though i am open to CA and I definitely want a coed somewhat large school