1) A ball is lost if not found in three minutes after the player, partner or their caddies begin searching for it; time spent playing a wrong ball does not count in this three-minute period.
2) A player's ball lies on the putting green immediately behind a ball-mark on the putting green caused by the impact of their ball. In the process of repairing the ball-mark, the player accidentally causes their ball to move and replaces it before their next stroke. What is the ruling?
3) In stroke play, two players strike their balls into the same area of high grass. Two balls are found, but because there are no identifying marks on either ball, neither of the players can identify a ball as theirs. What is the ruling?