Assignment Problem A contractor is assembling a crew with six positions. The contractor will select the six people from among a dozen of firm's employees who are willing to travel. Each of the dozen people who are eligible for the assignment has been ranked according to effectiveness in each of the six slots. The selection problem is to choose the ix crew members from the $12$ eligible employees in such a way that the crew's total effectiveness is maximized. You are given the effectiveness eij of the ith eligible employee in the jth position on the crew. in all $72$ parameters.