Misc: Who was the blind Norse god of who shot balder?

Questions

Also called Bettas, the males of what fish species are bred in Thailand for the purpose of competitive combat, with people gambling on the matches.?

Hybrid offspring of the jackass (male ass) and the mare, much used and valued in many parts of the world as a beast of burden.?

American inventor and teacher of the deaf, most famous for his invention of the telephone.?

Acute, infectious, contagious disease of the respiratory tract, especially the trachea?

What two characters from Sesame Street got their names from the movie 'It's a Wonderful Life'?