Tank sizes for 1990 Fleetwood Flair?

Just wondering if anyone knows what the fresh/grey/black tank sizes are for our 1990 Ford Fleetwood Flair 30 foot Class A RV? Can't find anything in the owners manual and we've got folks asking about tank sizes because we're selling it. In case it helps, here's the posting for photos that may offer clues https://vancouver.craigslist.ca/nvn/rvs/6474317198.html

Thanks!