Mike knows that he can make 12 of his super delicious meatballs from 1 pound of hamburger . he wants to make meatballs for the football party on sunday, and he estimates that there will be five people there (including himself) who will eat meatballs , and that each person will eat approximately seven meatballs. how many pounds of hamburger should he thaw out so that he can make enough meatballs for everyone at the party?