Santa Claus is assigning elves to work a shift making toy trucks. Apprentice elves draw a wage of forty candy canes per shift, but can only make 32 trucks in a shift. Senior elves can make 48 trucks a shift and are paid 64 candy canes per shift. There is only room for nine elves in the truck shop, and due to a candy-makers’ strike, Santa Claus can only pay out 480 candy canes for the whole 8-hour shift. What is the maximum number of trucks that can be built during the shift and how many of each type of elf should Santa assign in order to get that many trucks? Using the information in the problem, write the constraints. Let x represent the number of apprentice elf shifts, and y represent the number of senior elf shifts.