If you are using Microsoft Excel, then that would be easy.
In a spreadsheet, there are rows and columns. Click the row or cell adjacent to the new column that you will be adding. In versions of MS Excel 2007 and up, here's what you are going to do. In Home Tab, you can find "Insert" button. Click "Insert", then select "Insert Sheet Columns."
look up some facts about steam machines and then see when they were created and by who they were created and how they have evolved.
The clearer the resolution screen is it is better seen through the graphics. Say you have a bad computer screen, well your graphics are going to be bad. The better and higher quality it is will be the better you can see your images.