Thanks in advance!

Two distillation columns, which are overseen by engineers Gianna and Peter, separate three components. A liquid mixture enters the first column at 696kg/s and contains 35.0 mass \% ethanol (C2 H5OH),15.0 mass \% propanol (C3H7OH), and the balance butanol (C4H9OH). The bottom product stream of the first column contains 93.1 mass %B and no E, and 95.1% of the B in the feed stream is recovered in the bottom product stream. The overhead product of the first column is used as the feed stream to the second column. The overhead product from the second column contains 92.8% of the E in the feed to this column. The composition of the overhead product stream is 91.5 mass %E and the balance P. In the last level, the component flow rates of Stream 3 were found as: m3,E=244kg/s,m3,P=79.0 kg/s, and m3,B=17.0kg/s. Now, find the total mass flow rates exiting in the second distillation column. m4=mg5=