How well do you know Lake Balaton?

Five questions, just like at the end of a summer article — see how many points you score!

1. Which river is the largest inflow into Lake Balaton?
2. Through which waterway does water flow out of Lake Balaton?
3. Roughly how deep is Lake Balaton on average?
4. On which peninsula does the famous Benedictine abbey stand?
5. Roughly how long is Lake Balaton?