In the $4-$stage evaporation system shown in

figure a solution with $50\%$ by weight of

sugar by evaporating equal amounts of water

in each of the $4$ stages. A product stream is produced. A product stream is produced.

of $35000$lb$/($h$),$ starting from the feeding of $5000$lb$/($h$).$

Determine the composition of the intermediate currents and the

of the product.