No
No, but in 2004 there was a contestant from Aruba called Fatima Salie.
yes
John and Edward.
No.
Dr Pepper is the friendly pepper upper. It'll never, ever, ever let you down. (repeat line again)
no, only ever a judge!
one million dollars
Every country sells dr pepper because it is the best drink ever!
Yes he did. In 2004.
yes. you can see a video of the filming of the showcase on YouTube where the contestant also explains how he came up with the exact price.
The is no record I could find of his ever being a contestant, possibly because the name is misspelled, but no devid or Heumer is listed in the Jeopardy archive of past games.