Task $4.$ Mass Balance $($Separation$).$ To recover the Bisphenol A from the vapour stream, the mixture is fed to a flash drum $($separating vessel$).$ The drum is able to separate $80\%$ of the bisphenol A from the inlet stream as a liquid containing $1\%$ water $($by mass$).$ The rest of the water, reactants, by$-$products and bisphenol A exit the flash drum as a vapour. Complete the mass balance $($with block diagram and stream table$)$ and calculate the $\%$ composition of the vapour. Re calculate the overall yield of the process, given the quantity of acrylic acid lost in this step. Put this adjusted yield value in the executive summary $1$