Do Exercise 13-7 for the generalized assignment model min 15x1,1 + 10x1,2 + 30x2,1 + 20x2,2 s .t. x1,1 + x1, 2 = 1 x2,1 + x2,2 = 1 30x1,1 + 50x2,1 … 80 30x1,2 + 50x2,2 … 60 x1,1, x1,2, x2,1, x2,2 = 0 or 1 Dualize the first two main constraints and solve with v = 10, 02, v = 110, 122, and v = 1100, 2002.