This blockquote element has z-index auto (initial value, no explicit CSS
rule defined)
This paragraph has z-index auto. This emphasized text has
z-index of UA-default, even though em is descendant of p (property not
inherited).
This strong text has z-index of 5
This h3 heading has z-index of inherit
This h4 text has z-index of 10
This h5 heading is UA-default (percentages don't apply)
The rules applied are "p {position: static; z-index: auto}",
"strong {position: relative; z-index: 5}",
h3 {position: absolute; z-index: inherit}",
h4 {position: fixed; z-index: 10}",
h5 {position: 200%; z-index: 150%}".
NOTE: From all elements listed above, position property should apply to all
elements.