All around speaker size?

'99 3.8 Camaro- I've got the camaro with the 6 speakers in it. I know the "abouts" of the sizes, but thought i'd check any way. What are the sizes of the door? Of the back seat wall? And the main one is the 2 in the trunk area. Also, the one's in the trunk have two slots for speakers. Only one slot is filled with what looks like around a 4" speaker. Is the other for a tweeter? What size is it?
Any help's appreciated

http://www.cardomain.com/fit/CHEVROLET/CAMARO/Z28/1999

there ya go bud

thanks man.. i appreciate it. so that other spot in the hatch area is for a tweeter (component system)?