Two spectators at a soccer game in Montjuic Stadium see, and a moment later hear, the ball

Question:

Two spectators at a soccer game in Montjuic Stadium see, and a moment later hear, the ball being kicked on the playing field. The time delay for spectator A is 0.23 s, and for spectator B it is 0.12 s. Sight lines from the two spectators to the player kicking the ball meet at an angle of 90". How far are
(a) Spectator A and
(b) Spectator B from the player?
(c) How far are the spectators from each other?