UnScramble this Word: a s r s e c h?

Questions

who recorded "the cat's in the cradle" in 1974?

acronym for quasi-stellar radio source, any of the blue, starlike objects that are strong radio emitters and the spectra of what exhibit a strong red shift?

who wrote "the life and opinions of tristram shandy, gent"?

who recorded "girl watcher"?

who recorded "you're so vain"?