A solution collected of 10% methanol (MeOH), 50% ethanol (EtOH) and 40% water (H2O) is fed at the rate of 100 kg/hr into a separator that constructs one stream at the rate of 60 kg/hr with the composition of 15% MeOH, 5% H2O, and 80% EtOH and a second stream of unknown composition. Determine the composition of the three compounds in the unknown stream and also explain its flow rate in kg/hr.