The expert answer is wrong please help to solve correctly.

Q$2.$ A final clarifier is to be designed for an activated sludge plant treating industrial wastewater. Sludge settling

studies using an acclimated sludge function of solids concentration and the results are shown in table below. The

design mixed liquor flow to the final clarifier is $2640gpm,$ the MLSS is $2500m\frac{g}{\text{I}},$ and the underflow concentration

is $10,000m\frac{g}{l}.$ A scale$-$up factor of $1\mathrm{.}5$ is to be used for the solids flux value. Determine:

a$.$ A plot of settling velocity $(f\frac{t}{h}r.)$ vs$.$ solids concentration $(m\frac{g}{l})$

b$.$ The solids flux, lb$./$hr$-f{t}^2,$ for each test, and plot a curve of solids flux vs$.$ solids conc. $($mg$/$l$)$

c$.$ Determine the design solids flux, $G_L,$ design in $lb./$hr$-f{t}^2$ using a scale up factor of $1\mathrm{.}5.$ Note: $G_L,$ design $=\frac{G_L}{1\mathrm{.}5}$

d$.$ Determine the diameter of the final clarifier

e$.$ Determine the design diameter of the final clarifier if sludge rake equipment is available in $5-$ft increments.

Test Conc., mg$/$l V$,$ m$/$h

$112,1000\mathrm{.}0332$

$211,2000\mathrm{.}0494$

$38,1000\mathrm{.}119$

$44,9000\mathrm{.}539$

$52,9501\mathrm{.}84$

$62,4902\mathrm{.}43$

$71,6203\mathrm{.}36$