Simplex Method Implementation Minimize 2x1 + 1x2 - x3 + x4*0 Subject to: c0: x1 + x2 - x33 = 2 c1: 2x1 + x3 - x4 = 9 c2: 2x2 - x40 = 5 c3: - 1x1 + x24 + 9x3 - x49 = 17 Domain: x1 >= 0 x2 >= 0 x3 <= 0 x4 unrestricted