You own a hamburger franchise and are planning to shut down operations for the day, but you are left with 9 bread rolls, 13 defrosted beef patties, and 11 opened cheese slices. rather than throw them out, you decide to use them to make burgers that you will sell at a discount. plain burgers each require 1 beef patty and 1 bread roll, double cheeseburgers each require 2 beef patties, 1 bread roll, and 2 slices of cheese, while regular cheeseburgers each require 1 beef patty, 1 bread roll, and 1 slice of cheese. how many of each should you make?