Ok, in the first one we have the following posible side lenghts:
3,12,13
We are going to check if S+M>L, so let's do it: 3+12>13 --->15>13, that is true so the answer is Yes.
Now let's check if is a right triangle:
¿3²+12²=13²?
9+144=169
153 is diferent of 169, so isn't a right triangle.
Considering that isn't a right triangle neither is it "triple pythagorean" because don't satisfy that a²+b²=c.
So, the answer in the first row are: Yes, No, No.