[6.8] The following simplex tableau shows the optimal solution of a linear programming problem. It is known that x4 and xs are the slack variables in the first and second constraints of the original problem. The constraints are of the type. 2 x Χρ RHS Z 0 -35 x3 0 0 1/4 1/4 5/2 0 -1/2 0 -1/6 1/3 2 a. Write the original problem. b. What is the dual of the original problem? C. Obtain the optimal solution of the dual problem from the tableau.