Update to urgent

1 What is the minimum-cost schedule for the bank?

2 What are the limitations of the model used to answer question 1?

3 Cost might be reduced by relaxing the constraint that no more than 40% of the day’s requirement be met by part-timers. Would changing the 40% to a higher value significantly reduce cost?

4 Force the full-time workers starting at 9 am and working for 8 hours to be 30 or more