A five-worker crew was assigned to install plumbing in a building. The contractor initially estimated his five-worker crew could complete the work in 45 days. To accelerate the work, two additional five-worker crews were assigned to the project.

1. How many days will the three crews require to complete the project?
2. What is the change in labor cost between using one crew and using three crews if each worker is paid $42 per hour and works 8-hour days?
3. If the owner of the project directed the acceleration of the work by requesting additional crews, as described in the problem statement, how might the contractor use the calculation in part b) to make and justify a claim for additional compensation from the owner?