4. How do you go back to the standard/canonical form for a LP when: a. You have an inequality constraint with a sign? b. You have a decision variable that is not constrained (i.e. unrestricted)? 5. What first and second order conditions hold at the relative maximum of a smooth multivariate function? 5 6 How do we know within the simplex (tableau or basis representation) that the current solution is optimal? 7. Briefly explain the intuition behind the graphical approach of solving simple LPs