Misc: what is the second most used letter in english?

Questions

The first four notes of the first main melody in Chopin's "Minute Waltz" in Db are: ?

The first three notes of the main theme of the second movement in Beethoven's Pathetique Sonata are: ?

Which composer had the "house-gig" for 25 years as Kapellmeister at the Court of Prince Esterhazy ?

The National Anthem of Austria has been referred to as musically the finest National Anthem ever written. Who composed this work ?

Who, after a performance of the "Messiah" was heard to sob, "Handel is the master of us all" ?