@arydob sent me this link linux - How to view starting and ending address of memory segments like stack, data, heap and code? - Unix & Linux Stack Exchange
In the first question: “Submit the size of the stack space after overwritting the EIP as the answer. (Format: 0x00000)” under “Generating shellcode section” the answer is actually the stack size, not sure why it says “after overwritting the EIP”
The same for the last question in "Skill Assessment " the answer is just the stack size