4) You are given the tableau shown in Table for a maximization problem. Give conditions on the unknowns a1, a2, a3, b, and c that make the following statements true: a. The current solution is optimal. b. The current solution is optimal, and there are alternative optimal solutions. c. The LP is unbounded (in this part. assume that b 2 0). Z X1 X2 X3 X4 X5 rhs 1 - C 2 0 0 0 10 D - 1 Ell l 0 U 4 O 3.2 - 4 0 1 0 1 0 a3 3 0 0 1 b