The rules applied are:
#id1 {bottom: 2px; position: absolute}
#id2 {bottom: 50%; position: absolute}
#id3 {bottom: auto; position: absolute}
#id4 {bottom: inherit; position: absolute}
This paragraph has position absolute, and bottom of 2px.
This paragraph has position absolute, and bottom of 50%.
This paragraph has position absolute, and bottom of auto.
This paragraph has position absolute, and bottom of inherit.
All other properties of this page should be UA-default.