Three boats going upwind. X to windward of A, but very close to her and they are bow even. Y is to leeward of A, on the same ladder rung, but separated about 2 boat lengths from A.
Y tacks to starboard. As soon as Y reaches close hauled on starboard, A hails for room to tack. X promptly tacks, and Y ducks A as she is heading up to tack into the space X has given her.
As soon as Y starts ducking A, X protests A for hailing for room to tack even though she did not need to, as Y ducked her. Y protests boat A for breaking rule 10.
What should the call be?