Please solve using Gaussian Elimination

Please show all steps

For the system shown below write the material balance and then use Gaussian Elimination or Gauss-Seidel Method to solve for the molar flows of D1, B1, D2, & B2. Print the values of the flow rates with the appropriate units. Show all steps. (50 Marks) D { 7% Xylene 4% Styrene 54% Toluene 35% Benzene D B: { 15% Xylene 25% Styrene 40% Toluene 20% Benzene 18% Xylene 24% Styrene 42% Toluene 16% Benzene 15% Xylene 10% Styrene 54% Toluenc 21% Benzene D2 Fr=70 kg-mol/min B B2 24% Xylene 65% Styrene 10% Toluene 1% Benzene