Using Tableau, you will create 3 (or more) maps and accompanying bar charts to convey a story about one source of electrical power (coal, solar, nuclear, wind etc.). 1. Create a bubble map for your chosen power source (the data is on the sheet labeled: “power by date, source & state”). Filter to show data for 2012 only (if you don’t filter, it will combine values for all years). Experiment with changing the size, color and transparency of the bubbles. Pay attention to whether these changes affect the message. 2. Create a bar chart for that same data. Sort by size and remove the bar for the entire US since that makes the other bars too small. Think about the differences between the your understanding of the data when it is presented as a bubble map and when it is presented as a bar chart. 3. Create 2 more bubble maps for 2 more years so you can see changes over time. Each time you create a new map, the size of the bubbles will automatically adjust to the data you provide. This is problematic if you want to compare differences in size across multiple maps so you’ll want to specify the size range (the value automatically included as the maximum value will be the value for the entire US unless you exclude it as shown in the video). 4. Create 3 choropleth maps using the same data. (Remember to exclude the value for the US total as shown in the video). Experiment with the color scheme options. Try using stepped colors rather than a continuous gradient of colors. Pay attention to whether these changes affect the message. To make your task easier when in the second part of this assignment, use a stepped color scheme for your final product. Print to pdf. Print the entire workbook (which should contain 9 worksheets) to a pdf file. Then move on to the next section. Source.