Misc: In 1902 Dr Howard T ---------- Boston, a designer of Univac computer, born.?

Questions

In Greek mythology, who did Ganymede replace as Cup-Bearer to the Gods?

In which year, in World War Two, did Germany invade Denmark?

Where did two Boeing 747 aeroplanes collide on a runway in 1977, with 583 fatalities?

Cernan and Scmitt were the last men to do what?

In what year did Joseph Stalin die?