I need to build a ported enclosure for an 18 inch subwoofer. Help?

I don’t know (and can’t find) anything about the speaker except.

300 Watts RMS
1000 Watts Peak
18”
100 oz. Magnet

I need to build a ported enclosure by tomorrow!!

I need to know:
What does my internal volume need to be?
Dimensions of the port?
Best shape?

And anything else you think will help!!! THANKS!!!!!!!!!!