F$\mathrm{.}3.$ A membrane unit has a water recovery rate of $92\%.$ Your boss asks you to determine which stage configuration will produce the most flow if you have an inlet flowrate of $45,000$ gpd$.$

F$\mathrm{.}3.$a$.$ What is the expected permeate flow rate $[$in gpd$]$ if a $3-2-1$ concentrate staged system is used?

F$\mathrm{.}3.$b$.$ What is the expected permeate flow rate $[$in gpd$]$ if a $2-$pass $2-$staged system is used?

F$\mathrm{.}3.$c$.$ Assuming equal performance for both system configurations in contaminant rejection, which should you recommend to your boss?