Hiii, this is a problem that I have encountered and I need help ASAP.

This is the figure:

Thanks a lot!

So far what I have done are:

draw 2 lines down. from point D and C. So it will form a rectangle in inside the trapeoid. Then according to that, I can figure out the bottom base line (the 18 one) can be divided into 5, 8, 5. =/ I need some help to move on =/ I can't seem to be able to figure out it. Thanks alot

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