i didn't take a lotta time, and if explanations sound intriguing to anyone, just let me know.
i really scanned through this, cuz i care more about the point dy's getting to, not how much i already know about it.

1.false
2 true
3 false
4 true
5 true
6 false
7 true
8 true
9 false
10 false
11 false
12 true
13 true
14 true
15 true
16 true
17 true
18 true
19 true
20 true
21 true
22 true
23 false
24 false