Q$2$ Extraction will be carried out using Solvent in a

Plate column. the feed flow rate is $150\frac{m^3}{d}ay.$ The

column will be operated $24$ hours a day, $350$ days a

year. Amual fixed expenses are dive by the equation

below.

Annual fixed Expenses $=12350M^2-105000M+225000$

$($$$/$year$)$

Her $M$ is $m^{3}sd$ uart $\frac{?}{m^3}$ foed. operating expenses and of her

expenses are $$1,75$ perm ${?}^3$ of solvent passind thfoogh the colue

a$)$ How many $m^3(M)$ of Solvent per $m^3$ feed under minmum total

amual expense conditions?

b$)$ What is the minimum total annual expense at this $M$ value

in $\frac{\text{\$}}{?}$ year?