4. (8 points) Determine if the following tableau is the final tableau for a maximization LP? if not, apply the simplex method to find the final tableau. Then, if the LP is unbounded, clearly indicate why. If it has a unique solution, write it down. If it has multiple optimal solutions, write down three of them. Row: 2102 S1 R0 |1| 0 | 0 04 10 82 RHS R1 0 0.5 0 1 -1 0.5 R2 0 0.5 1 0 1 2.5