Which one of these is not a font-weight descriptor in CSS3?

Is the following valid? "box-shadow: -5px -5px -5px #ccc;"

What does this code do? @import url("mystyle.css");

Does CSS3 totally take over CSS2 or can the two be mixed?

Which selector can be used to target every element on a page?

What are the 4 current vendor prefixes for css3 properties? (5 major desktop browsers, not mobile or tv)

Which property allow percentages in their value fields?

Which style is not valid for an image?

The RGB color model is hardware-specific while the HSL is symmetrical to lightness and darkness.

If the nav-index property of textbox1 is set to 10, that of textbox2 to 5 and that of textbox3 to 8, what will be the navigation order?

The color in three digit RGB notation is #fb0. What will be its equivalent six digit color code?