Provide a style rule to horizontally center a block element within its container with a top/bottom margin of 20 pixels.

Which of the following selectors matches an h1 heading with the id “topHeading”?

Which style rule will underline the last item in an ordered list?

Provide a style rule to create a red halo effect with no shadow offset, a blur of 15 pixels and a shadow size that is 10 pixels larger than the element. 

The element to create a figure caption is:

For the following style rules, what is the font size of the h1 heading in pixels? body {font-size: 16px;} body > article {font-size: 0.75em;} body > article > h1 {font-size: 1.5em;}

Provide the transformation to shift a page object 5 pixels to the right and 10 pixels up.

Provide the transformation to reduce the horizontal and vertical size of an object by 50%.

Provide code for a linear gradient that moves in the direction of the lower-left corner of the element through the colors: orange, yellow, and green. 

Which of the following displays an alert box with the message “Good Morning” if the value of the thisHour variable is less than 9?