An aqueous solution contains 30% by weight of ethanol, a simple distillation is used to recover 80% of the alcohol contained in said solution. Determine the composition of the residual solution if it is known that the system follows the model

X 0.01 y 0.103 0.03 0.04 0.05 0.1 0.2 0.235 0.27 0.325 0.444 0.529 to da dx o In 11 1 0,210 y - 2