Hey Brian, You gotta add a <cologroup> element after the <caption> element and before the <thead> element of the table, and add <col> as it’s child elements like this:
<colgroup> <col> <col> </colgroup>
Note that you have to add as many <col>'s as there are columns in your table or you can simply use the span attribute to ease up things a bit and add minimum <col> elements. Then you can add style of your choice to that particular <col> that happens to be the column you wish to tweak. For example: