How bad can senior grades get?

I’m a senior, and I have been admitted to a number of top 20 LACs. I don’t think I need to worry about getting my admissions rescinded, but I’m just a little paranoid. This is what I predict my grades might look like:

AP Economics: B
AP Environmental: A
AP Spanish: B+
AP Calculus: A-/A
AP Literature: A
Choir: B+ (due to some absences)

Are these grades bad enough to get rescinded anywhere? I’ve had a 4.0 unweighted GPA up until now, but I’ve succumbed to senioritis a bit. These grades would put me at a 3.5-3.6. Is this bad?

No

Choir, in most cases, won’t even figure into what colleges consider for GPA calculation.

I’ve heard a straight A student can drop to a few B’s and a C and still be fine for admission. However, if you start earning C’s across the board, or get a D or F, you’ll be at a fairly high risk for having your admission rescinded.

I believe one person on this site was also advocating people accepted to Harvard or Princeton to actually actively try to get a C as a way to relax after 4 years of hard work.

Does my quarter grade matter? Or do they only see the final grade.
For example,
Lets say I was taking 6 classes and my quarter grades end up being something like this
Q1 Q2 Q3 Q4
A A C A Avg= somewhere like B+ or B
A A A- B+ Avg = somewhere like A or A-
A A D+ A Avg = somewhere like lets say B+

Would this result in a heavy consideration for rescind? Or do only final grades matter

I was admitted to a couple ivies with worse grades than that on my midyear report (a B- and a few B+) - you don’t need to worry