If statement #1 above is true, this paragraph should have a margin of 10px. The rule applied is '#id1 {margin: 10px}", where "+" is implied, followed by the number 10, followed by the unit identifier (px, for pixels).
THis paragraph should also have a margin of 10px just like the paragraph above. The rule applied is "#id2 {margin: +10px}". where "+" is explicit, followed by the number 10, followed by the unit identifier px.
This paragraph should also have a margin of 10px just like the two paragraphs above. The rule applied is "#id3 {margin: 10.px}", where "+" is implied, followed by the number 10. (with a decimal point), followed by the unit identifier px.
This paragraph should have a margin of -10px (negative number). The rule applied is "#id4 {margin: -10px}", where "-" is sign (explicit), followed by the number 10, followed by the unit identifier px.
All other properties of this page should be UA-default.