4. The analysis in this section assumes that the optimal solution of the LP at t = 0 is obtained by the (primal) simplex method. In some problems, it may be more convenient to obtain the optimal solution by the dual simplex method (Section 4.4.1). Show how the parametric analysis can be carried out in this case, then analyze the LP of Example 4.4-1, assuming that the objective function is given as Minimize z = (3 + t)Xl + (2 + 4t)X2 + X3, t 2:: 0