music artists: who did "take the long way home" in 1979?

Questions

What composer wrote a piece which became the nationalanthem of two different countries ?

The opening line of this song asks, "My God, Why hast Thou forsaken me" ?

What composer was born in Rohfrau, Lower Austria in 1732 and dies in Vienna in 1809 ?

Schubert's "The Earl King" sets to music the work of what great poet ?

This composer was born in 1860 in Bohemia and died in 1911 in Vienna. ?