Misc: Who, posthumously, was the Formula 1 Drivers' World Champion in 1970?

Questions

A poem written to celebrate a ---------- is called a epithalamium.?

A poem written to celebrate a wedding is called a---------- .?

A scholar who studies the ---------- de Sade is called a Sadian not a Sadist.?

A scholar who studies the Marquis de Sade is called a ---------- not a Sadist.?

A scholar who studies the Marquis de Sade is called a Sadian not a---------- .?