Follow the instructions given below, the answers should Start by rearranging the below expression to obtain an expression for S in terms of D$.$

Note that rx$/$x $==$ D$.$ Use this to develop a relationship between S and D$.$

Then, relate x and s through Yx$/$s and use this relationship to obtain x vs$.$ D values. Use the

range for D values given in the problem statement.

Estimate Dopt from plots of Dx vs$.$ D$.$

Answers: $($ii$)$ Estimate Dmax for uninhibited $=0\mathrm{.}33$ h$-1$ and Dmax inhibited $=0\mathrm{.}2$ h$-1.$

$($iv$)($DX$)$uninhibited $=0\mathrm{.}27$ g$/$L$-$h and $($Dx$)$inhibited $=0\mathrm{.}12$ g$/$L$-$h$.$