Misc: Where does the kangaroo’s tail have to be situated in order for it to jump?

Questions

He was Dave Brubeck's sax player, you may have heard him on "take five"?

He wrote the Monkees hits "Im a believer"?

Neneh Cherry's jazz musician father (full name!)?

Prince song "maybe im just like my father, too bold"?

Princes protege of the Time, he had a big role in "purple rain"?