The exterior walls of a retail store require the installation of jumbo face brick. A crew of bricklayers and laborers consisting of three (3) workers, working ten (10) hours a day will install the jumbo face brick at the production rate of 505 SF/crew-day. The project includes 3,000 LF of brick wall to be installed that is 16ft in height. The general contractor requires the entire face brick operation to be completed in no longer than five (5) weeks (5 working days per week). How many crews are required?