Game situations

[Middleman]

A couple of situations. Proper penalty/procedure, please.

1. Libero is playing in the LB position. After a loss of rally/point by the opponent, the Libero moves to the serving position. Team A properly executes the double replacement. After the R1 signals to serve, the Libero (server) kneels, sets the ball on the floor and, with a wave, proceeds to re-tie her shoe. More than five seconds pass.
2. After a loss of rally/point by the opponent, team A requests a substitution as RF rotates to a serving position on the left (bench side of the court). R2 whistles for the substitution, but his “two toots” were not clear and distinct. While the substitution was still in progress (player and substitute had not been released) the server proceeded to serve. R1 had not signaled to serve.
3. After a loss of rally/point by the opponent, team A server is in position to serve as her teammates rotate to take offensive positions. R1 whistles for the serve. An instant later, almost simultaneously, R2 recognizes that a player is approaching the substitution zone and whistles. No substitute had left the bench at the time of the whistles.