1) Violation. "You are where you were." A2 caught the ball while location was in FC and then landed in BC.
2) Violation. A2 was in FC when he/she caught the ball and then went to BC.
3) Assuming that A1 was in BC (you didn't specify), no violation. A2 caught the ball while in BC and when lifting the FC foot, A2 is still in BC.
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