What is the Capital of: Serbia and Montenegro?

Questions

In Roman mythology, who was the father of Romulus and Remus?

Name the painting medium which involves the use of egg yolks?

At 30 miles long, in which North American city would you find Figueroa Street?

In which North American city would you find the 1815 feet high C.N. Tower?

In what capacity did Ernest Hemingway take part in the first World War?