I need hell for css3/html

/* Center Article Styles */

CSS Styles Part 2 Center Article Styles Go to the Center Article Styles section. The article element contains an image and brief description of the Apple Bavarian Torte, which is the subject of this sample page. Create a style rule for the section#center article selector that adds the following: o a radial gradient to the background with a white center with a color stop of 30% transitioning to rgb(151, 151, 151) a 1-pixel solid border with color value rgb(151, 151, 151) and a radius of 50 pixels Llal K/S a box shadow with horizontal and vertical offsets of 10 pixels with a 20-pixel blur and a color of rgb(51, 51, 51) CSS Styles Part 2 Center Article Styles Go to the Center Article Styles section. The article element contains an image and brief description of the Apple Bavarian Torte, which is the subject of this sample page. Create a style rule for the section#center article selector that adds the following: o a radial gradient to the background with a white center with a color stop of 30% transitioning to rgb(151, 151, 151) a 1-pixel solid border with color value rgb(151, 151, 151) and a radius of 50 pixels Llal K/S a box shadow with horizontal and vertical offsets of 10 pixels with a 20-pixel blur and a color of rgb(51, 51, 51)