https://naiwaen.debuggingsoft.com/2020/05/excel-%e0%b8%aa%e0%b8%a3%e0%b9%89%e0%b8%b2%e0%b8%87-stack-chart-%e0%b8%95%e0%b8%b2%e0%b8%a1%e0%b8%81%e0%b8%a5%e0%b8%b8%e0%b9%88%e0%b8%a1%e0%b8%82%e0%b8%ad%e0%b8%87%e0%b8%82%e0%b9%89%e0%b8%ad/