Table:
text: List of tennis stadiums by capacity
WTA tour venues
WTA tour venues
Rank_ Stadium Capacity City Country Tournament_hosted
27 Ariake Coliseum 9000 Tokyo Japan Japan Open Tennis Championships
28 Devonshire Park Lawn Tennis Club 8000 Eastbourne United Kingdom Eastbourne International
29 Steffi-Graf-Stadion 7000 Berlin Germany Qatar Telecom German Open
30 Khalifa International Tennis and Squash Complex 6911 Doha Qatar Qatar Ladies Open
31 Porsche Arena 6100 Stuttgart Germany Porsche Tennis Grand Prix
32 = Fairmont Acapulco Princess 6000 Acapulco Mexico Abierto Mexicano Telcel
32 = Margaret Court Arena 6000 Melbourne Australia Australian Open
32= Roy Emerson Arena 6000 Gstaad Switzerland Allianz Suisse Open Gstaad
32= Grandstand Stadium 6000 New York City United States US Open
36 Intersport Arena 5699 Linz Austria Generali Ladies Linz

Question: Which country has a grandstand stadium as the stadium on the list of WTA Touring Venues among tennis stadiums by capacity?

Question: From the list of tennis stadiums by capacity, what is the average capacity that Switzerland has as a venue for the country's WTA Tour?