Over the past year, Barned and Noble shifted production of their Nook electronic book reader to Samsung, which allowed B&N to cut cost by focusing on the Production of digital content like e-books. Please use the Porter’s Five Forces to analyze the potential that B&N and other firms in the e-book market will have to earn positive economic profits. For example, one of the forces is Threat of Substitutes – you should briefly list any substitute products for digital books and describe whether this situation may lead to high profits (if there are few substitutes) or low profits (if there are many potential substitutes). After analyzing each of the five forces, please provide a brief summary of the overall potential for economies profits in the market