Consider the model given in Prob. 5.3-13.

(a) Construct the dual problem.

(b) Use the given information about the basic variables in the optimal primal solution to identify the nonbasic variables and basic variables for the optimal dual solution.

(c) Use the results from part

(b) to identify the defining equations

(see Sec. 5.1) for the optimal CPF solution for the dual problem, and then use these equations to find this solution.

(d) Solve the dual problem graphically to verify your results from part (c).