<prompt> Kuandika CSS code kutumia style sheria chache kwenye ukurasa wa wavuti.Kichwa font-size: 18px Rangi ya background: f7f:  <response>: Here is a sample CSS code that you can use to apply the specified style rules on a webpage:cssbody background-color: f7f7f7;h1, h2, h3, h4, h5, h6 font-size: 18px;In this code, the body selector targets the entire webpage, and the background-color property sets the background color of the page to the specified hexadecimal value f7f7f7.The h1, h2, h3, h4, h5, and h6 selectors target all heading elements on the page, and the font-size property sets their font size to 18px. 