In this assignment, you'll be visualizing and interpreting data pulled from the balance sheet and income statements of major US airlines $($Delta$,$ United, Alaskan, American, JetBlue, and Southwest$)$ sourced from Yahoo Finance.

Click here to view the data in Tableau, and here to view it in Power BI$.($The Tableau and Power BI files contain the same data; you can use either to answer the questions in this assignment. Your instructor may specify which program they prefer you to use!$)$

How to Access Tableau: You can open the Tableau file in this problem statement with Tableau Desktop software. If you don't have Tableau Desktop, you can download Tableau Reader, a free program that allows you to open Tableau visualizations. To get it$,$ search for "Tableau Reader" in your internet browser, or click here.

How to Access Power BI: You can open the Power BI file in this problem statement with Power BI Desktop. If you don't have it already, search for "Power BI download" in your internet browser, or click here for a free download.

In the airline industry, unearned revenue represents a significant amount of liability since airline tickets have been purchased by customers, but revenue has not been "earned" since the flight has not been taken. You are a financial controller at a new airline company called Desert Airways. You are asked by the CEO to interpret a data visualization dashboard comparing Desert Airways' unearned revenue in competing airlines and answer the following questions.

What airline had the highest unearned revenue to total revenue ratio in $2018?$

Southwest Airlines

American Airlines

Alaskan Airlines

JetBlue Airways