And Because the spectrum of the discrete time sign, this similar spectrum will periodically repeat if we extended the frequency greater outside of $f_s$ this sort of the spectrum shown can be precisely the same spectrum in every single frequency band from $nf_s$ to $(n+1)f_s$ for almost any integer $n$. https://boyspgsector14gurgaon.art.blog/2025/07/28/top-student-friendly-pg-in-gurgaon-sector-14-only-at-osmstays/