$(10$ points$)$ Open a Blank Model in Simulink. Save it as HW$5\_3$ in the current folder. Using the

blocks from Simulink Libraries, create a model that simulates an almost neutral buffer in which

concentration of $H+$ from solution are represented by variable $t$ and the pH is modeled by

$s(t)=10sin(t)$

When pH of the buffer has values greater than $8$ or less than $6\mathrm{.}8,$ the buffer preserves as pH

value $8$ respectively $6\mathrm{.}8,$ otherwise the pH is given by the pH of $H+$ ion concentration, $s(t)=$

$10sin(t)$