Misc: Which film covers the life of John Reed?

Questions

Which King of the Scots was succeeded by his stepson Lulach?

The name of which wind instrument comes from the latin word for a young bull?

Which railway engineer designed the locomotives Sans Pareil and Royal George?

What was designed to - carry four adults wearin hats and clogs, along with 50kilos of potatoes?

Which early Hollywood film star originally named Gladys Mary Smith was known as Americas Sweetheart?