Misc: What sea animal looks like a pin cushion?

Questions

Who was the first Prime Minister of the Australian Commonwealth from 1901 to 1903?

Which Paris fashion house produced the perfume Ma Griffe?

Which architect designed the Queens House at Greenwich which is now part of the National Maritime Museum?

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?