Find and read the article: A hornets nest. The Economist, 22 September 2018. The article describes a startup that is pursuing a business model of narrow banking. a. (3 points) Define narrow banking. b. (7 points) How does TNBs business model differ from a traditional deposit-taking institution? In particular, how will its balance sheet differ, who will be its customers (sources and uses of funds), and how does it plan to generate profits?