I need a step by step solution thanks. Problem $1$:

Consider the design of a wastewater treatment plant $($WWTP$)$ for a community. The raw sewage has an average of $230m\frac{g}{L}$ BODs and $260m\frac{g}{L}$ of suspended solids. The average daily wastewater design flows is $2\mathrm{.}0MGD.$

Assume that the primary sedimentation process removes $60\%$ of the suspended solids and $40\%$ of the $BO{D}_5$ of the raw sewage.

a$)$ Determine the $SS$ and $BO{D}_5$ concentrations in the primary sedimentation effluent flow.

The primary effluent is to be treated by two parallel trains of the complete mix activated sludge process. Assume average flow conditions, and the primary sedimentation performance as described in part $2$ above. Assume the following for the activated sludge process:

Plant effluent $BO{D}_5$ of $8m\frac{g}{L}$

Biomass yield of $0\mathrm{.}55kg$ biomass $/kg$ BOD

Endogenous decay rate $(k_d)=0\mathrm{.}04$ day ${?}^{-1}$

Solids Retention Time $({}_c)=8$ days

MLVSS concentration in the aeration tank of $3000m\frac{g}{L}$

Waste and recycle solids concentration of $12,000m\frac{g}{L}$

a$)$ Determine the aeration tank yolume in cubic meters.

b$)$ Determine the mass and volumetric flow rates $(k\frac{g}{?}$ day and cubic meters per day$)$ of wasted sludge.

c$)$ Determine the food to microorganism ratio $(\frac{F}{M})$ for the aeration tank in $kg$ BOD per day per $kg$ MLVSS$.$

d$)$ Determine the design hydraulic detention time $($HDT$)$ in hours.