5вопросов к тексту a hundred billion hamburgers

1. do  restaurant served only four or five things ? 2.mr. kroc opened his first mcdonald's in 1955,don't he 3.don't in 1955 that mr. kroc opened his first mcdonald's  ? 4.who was the creator mcdonald's? 5.the creator mcdonald's was mr. crock?