Stack contents at positions in a pascal program.

I'm trying to figure out how to determine what the stack of a program looks like at certain times. I have pictures of the code and the stack contents bellow, but I have no idea how to get from the code to the stack, an explanation would be higely apreceated. For some reason the images won't upload, so here are direct links: https://i.imgur.com/5Q6mqm3.jpg (the code itself) https://i.imgur.com/J9mxx57.jpg (stack contents at position one of the code)