Set the background color of the body element: * To add a CSS rule for the `body` element that sets the background color to `#E0E0E2`, we can use the following CSS code: ```css body { background-color: #E0E0E2; } ``` * This rule sets the background color of the entire HTML document's `<body>` element to a light grayish-blue color (#E0E0E2). Set the text color of h1 element: * To add a CSS rule for the `h1` element that sets the text color to `#721817`, we can use the following CSS code: ```css h1 { color: #721817; } ``` * This rule sets the text color of all `<h1>` elements in the document to a deep reddish-brown color (#721817). Set the text color of h2 element: * To add a CSS rule for the `h2` element that sets the text color to `#721817`, we can use the following CSS code: ```css h2 { color: #721817; } ``` * Similar to the previous rule, this one sets the text color of all `<h2>` elements to the same deep reddish-brown color. Align text to center for elements with the `center-text` class: * To add a CSS rule for the `center-text` CSS class that aligns the text to center, we can use the following CSS code: ```css .center-text { text-align: center; } ``` * This rule applies to any element with the class `center-text` and centers the text content within those elements horizontally. Center the `logo` element: * To add a CSS rule for the HTML element with the id `logo` that sets its left and right margins to `auto` and changes its display to a `block` element, we can use the following CSS code: ```css #logo { margin-left: auto; margin-right: auto; display: block; } ``` * This rule targets an element with the id `logo` and centers it horizontally within its parent container. The `display: block;` property ensures it behaves as a block-level element. Set text color and font size for span elements inside h2: * To add a CSS rule for all `span` elements that are children of `h2` elements that sets the text color to `#FA9F42` and its font size to `0.75em`, we can use the following CSS code: ```css h2 span { color: #FA9F42; font-size: 0.75em; } ``` * This rule targets `<span>` elements that are children of `<h2>` elements. It sets their text color to an orangey color (#FA9F42) and reduces their font size to 0.75em. Adjust padding and font size for the `copyright` element: * To add a CSS rule for the HTML element with the id `copyright` that sets its top padding to `12` pixels and its font size to `0.75em`, we can use the following CSS code: ```css #copyright { padding-top: 12px; font-size: 0.75em; } ``` * This rule targets an element with the id `copyright` and adds 12 pixels of padding to the top of the element. It also reduces the font size of the element's text to 0.75em. These CSS rules can be added to the `<head>` section of an HTML document using the `<style>` tag or in an external CSS file. Create a CSS file (e.g., styles.css): ```css /* styles.css */ body { background-color: #E0E0E2; } h1 { color: #721817; } /* Other CSS rules here */ ``` Link the CSS file in your HTML document: ```html <!DOCTYPE html> <html> <head> <link rel="stylesheet" type="text/css" href="styles.css"> </head> <body> <!-- Your HTML content here --> </body> </html> ```