Consider the following transportation problem:
The initial basic feasible solution of the above transportation problem using Vogel\'s Approximation Method (VAM) is given below :
The solution of the above problem:
Given the following statements with respect to linear programming problem:
S1: The dual of the dual linear programming problem is again the primal problem
S2: If either the primal or the dual problem has an unbounded objective function value, the other problem has no feasible solution.
S3: If either the primal or dual problem has a finite optimal solution, the other one also possesses the same, and the optimal value of the objective functions of the two problems are equal.
Which of the following is true?