In the SureStep no-backlogging problem, change the demands so that they become 6000, 8000, 5000, 3000. Also, change the problem slightly so that newly hired workers take 6 hours to produce a pair of...

In the SureStep no-backlogging problem, change the demands so that they become 6000, 8000, 5000, 3000. Also, change the problem slightly so that newly hired workers take 6 hours to produce a pair of shoes during their first month of employment. After that, they take only 4 hours per pair of shoes. Modify the model appropriately, and use Solver to find the optimal solution.