1. Blockbuster Video was founded in 1982 (back in the days before the internet) as a place where consumers could rent videos. It wasn't long before Blockbuster became the largest video chain in the U.S. and was earning above-normal profits. Yet in January of 2015, Blockbuster went out of business. Why couldn't Blockbuster maintain its above-normal profits? This is not a research question - a full credit answer will discuss the general concept involved here. It is not necessary to give specific details about Blockbuster's business.