Which two college dropouts founded Microsoft in 1975?

Who had a 1975 No. 1 hit with "Have You Never Been Mellow"? At the end of which 1975 film does police chief Brody say "I used to hate the water... I can't imagine why"? In which 1975 hit does John Denver explain why he's grateful for simple rural life? Who had a 1975 hit with the disco song "Love to Love You Baby"? Who won the Best Actress Oscar for playing Nurse Mildred Ratched in 1975? Pete Rose was the 1975 World Series MVP for which team? In Ken Russell's 1975 film "Lisztomania", Roger Daltrey of the Who played which Romantic-era composer? In which 1975 comedy does a villager claim "She turned me into a newt!" before admitting "I got better"?