4) Consider the given balanced transportation tableau given in Table 1. Supply 3 20 5 18 11 9 7 Demand 12 10 4 12 2 10 15 Table 1. a) If the numbers in cells are profit coefficients, then Use Minimum Cost Method to find an initial bfs (basic feasible solution). (Max z = Min-z) (15 pts) b) Apply transportation simplex algorithm to find the optimum solution (use initial bfs you found in (a)). Report the values of basic variables and objective function value (15 pts).