A mixture of A and B at the boiling point containing 40mol%A is continuously distilled to yield an upper product containing 97%A and a lower product containing no more than 4%A. The backflow rate is twice the minimum. The theoretical number of shelves required to separate this mixture; a) Find with the Mc Cabe Method (with the equilibrium curve graph) b) Find with the Ponchon-Savarit method (Enthalpy-Concentration graph), c) Calculate the heat taken from the condenser and the heat given to the boiler