Answer:
Add and name an I'd to the sub heading tag and add the value "blue" to the color attribute in the CSS file link.
Step-by-step explanation:
There are different but three major tools for web page development, there are HTML, CSS and JavaScript.
The html is a hyper text markup language that specifies the position and value of the tag.
The CSS file styles the tag values on the web page. To style a specific html element, add and name an "id" on the element, reference the id on the CSS file and add the value of an attribute,eg color: blue; .