Misc: who wrote 'i, claudius'?

Questions

What was the name of the submarine that sank in the Barents Sea in August this year?

What is the currency of Ecuador?

Who according to Hilaire Belloc, had a chief defect of "chewing little bits of string"?

Oliver Pollock, a New Orleans Businessman, creates the "$" symbol.?

Otto von Bismarck, statesman, born.?