1,000.00 kg h-1 of a mixture of benzene (B) and toluene (T) containing 50% benzene by mass is separated by distillation into two fractions. The mass flow rate of benzene in the top stream is 450.00 kg B h -1 and that of toluene in the bottom stream is 475.00 kg T h -1 . The operation is at steady state. What are the total flow rates of the top and bottom streams? What is the toluene concentration (wt%) in the top and bottom streams?