Ancient Greek Musical Instruments and Theatres and Sophocles, Oedipus the King

Question 1

These two related stringed instruments were strummed, or occasionally plucked, with a
plectrum in ancient Greece:

Answer 1

The Lyre and the Kithara.

Question 2

A character using this piece of stage equipment sometimes resolves intractable dramatic issues at the end of a Greek tragedy:

Answer 2

Greek tragedies end with
the deus ex machina. The mechane was a crane suspended above the skene. Another piece of theatrical machinery was the ekkyklema (wheeled skid), used to draw a corpse onto the stage or show reclining actors.