Case Analysis At&t in Memo format. 1. Introduction: Brief description (1 paragraph) of the business of each of publicly traded U.S. companies in similar businesses ( Comcast, tmobile, verizon). Do financial ratio comparisons of the three-four companies. Make sure you use data from the same year for each company. Use the data over the last three years. In the memo, discuss the following: Comparison of the liquidity (current ratio), financial risk (debt ratio), profitability (gross, operating, net profit margins), valuation (ROA, ROE & P/E ratio). (In this section you should be analyzing what the ratio comparison tells you about one company versus the other companies.) 3. Recommendations