a. Create an external style sheet (call it format 1.css) to format as follows: document background color of white, document text color of #000099, and document font family of Arial, Helvetica, or sans-serif. Hyperlinks should have a background color of gray (=cccccc). Configure the h1 selector to use the Times New Roman font with red text color. 11 the Times New Roman font with red text color. b. Create an external style sheet (call it format2.css) to format as follows: document background color of yellow and document text color of green. Hyperlinks should have a background color of white. Configure the h1 selector to use the Times New Roman font with white background color and