Go to the Grid Columns Style section. Create a style rule to float every div element whose class name begins with column on the left. Create style rules for div elements belonging to the following classes: .column100, .column50, .column33, .column67, .column25, .column75, .column20, .column40, .column60, and .column80 so that the width of each column is a percent equal to the size value. For example, div elements belonging to the .column100 class should have widths of 100%, .column50 should have widths of 50%, and so forth. Note: Use 33.33% for .column33 and 66.67% for .column67.