2a) Zechariah 1:18 Then lifted I up mine eyes, and saw, and behold four horns.
Zechariah 1:19 And I said unto the angel that talked with me, What be these? And he answered me, These are the horns which have scattered Judah, Israel, and Jerusalem.
Luke 1:34 Then said Mary unto the angel, How shall this be, seeing I know not a man?
2b) They did not cover the same issues