Arturo is selling ads for his school paper, The Gab Gazette. Burger Binge, Cobbies’ fish & chips,and doolittle donuts all want to buy ads, but arturo has only one page left to fill. the sizes of his ads are 1/2, 1/4,1/8, 1/16 of a page. Before Arturo sells the ads to the restaurants, he has t figure out all of the different combinations of his ads that would fill one page. How many combinations are there?