Misc: Where do hippopotamuses do 80%of their vocalizations?

Questions

On Three's Company,what's the first name of Mr. Furley's (landlord) tight wad brother who owned the building??

On Three's Company,what city did the trio live in??

On Three's Company,what is the name "Chrissy" is short for??

On three's company,what was Chrissy's father's ocupation??

What current cast member of ER was on an 80's show of the same name??