The answer is 72 because yeah I’m bad at explain but a line is 180 so 180-108=72
Yes you have the correct answers for each of the four problems. Nice work.
For anyone curious,
rd = removable discontinuity
id = infinite discontinuity
c = continuous
I don't understand the question, but I did get this:

Hope this helps!!
5; 6; 4; 14; 6
12; 2; 2; 68; 21
4; 10; 6; 32; 34
3;4;66;2;5
36;18;3 1/2;12/5;2
that's all i believe