Which band featuring brothers Alex and Eddie scored its first No. 1 hit with "Jump" in 1984?

In the 1984 presidential election, Walter Mondale carried only Washington, D.C., and which state? Under what pen name did Eric Blair publish his 1949 novel "Nineteen Eighty-Four"? Which city hosted the 1984 Winter Olympics and became a war zone in the 1990s? Which band released the 1984 hit "You Might Think"? "The Reflex" was the first U.S. No. 1 hit for which band, whose "Hungry Like the Wolf" had peaked at No. 3? In which 1985 film does 17-year-old Marty McFly get home early one night — 30 years early? Who led the Soviet Union from 1985 to 1991? In which 1985 John Hughes film do five high school students endure a daylong Saturday detention?