3. You are given the following simplex tableau for a minimization problem: The questions below asks you to change either zero, one or two elements in the tableau in order to make the stated condition true. Multiple correct answers may be possible. Identify the element(s) that should be changed and write the corresponding value. For instance, if the stated condition were: "The basic feasible solution has objective function value 7 ", the answer would be: "Change A0 to 7 ". (a) The basic feasible solution is degenerate. (b) The basic feasible solution is optimal. (c) The tableau is not optimal and the next pivot moves to a different basic feasible solution. (d) The tableau is not optimal and the next pivot stays at the same basic feasible solution. (e) The optimal value of the linear program is unbounded. (f) The basic feasible solution is optimal and the problem has a half-line of optimal solutions that starts at this solution and extends indefinitely in a direction