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Substances A and B are fed into asemi-discrete reactor at a volumetric flow rate of 0.5ft3/min. The concentration of substance A in the supply stream is 0.02 lbmo//fts, the concentration of substance B is 0.5lbmol/fi3. Initially in the reactor with a volume of 100ft3 there is a solution. The property of this solution is that it is identical with the supply current (the concentration of substance A is 0.02 llomol/fit . The concentration of substance B is 0.5 (lomol//ti3). The reaction takes place as follows. a) Subtract the model equality for A and B. b) Find the concentration of B and A in the tank after 30 minuter