int add$($int a$,$ int b$)\{$

int result $=$ a $+$ b;

return result;

$\}$

int main$()$

$\{$

int answer;

answer $=$ add$(40,2)$;

$\}$

Explain how a stack smashing attack can be performed by exploiting the code given above. Can you write step by step and draw a attack?