Question

Using Boolean algebra prove that the LHS = RHS

   a)   W.Y+ W'.Y.Z' + W.X.Z + W'.X.Y' = W.Y + W'.X.Z' + X'.Y.Z' + X.Y'.Z

    b)    A.D' + A'.B + C'.D + B'.C = (A' + B' + C' + D').(A + B + C + D)