quick Q regarding R1 passing R2

[jr131981]

follow up questions,

rule 8-1-a says the batter becomes a BR as soon as the batter legally hits a fair ball.

the relevant definition of a fair ball is subsection C) while on or over fair territory, touches the person, attached equiptment or clothing of a player or umpire.

rule 7-2-C says the first batter in each inning is the batter who follows the last player who completed their at bat in the previous inning.

is rule 8-1-a the relevant rule to invoke to determine which batter completed their turn at bat thus determines who leads off the following inning?

what if the batter hit a long foul ball and R1 is passed by R2 before the ball is caught?

what if the batter hit a long obviously out of play ball, R1 never moves, and R2 runs full speed on contact and passes R1 before the ball is out of play?

what if the batter hits a dribbler down the line, R2 passes R1 before the ball is touched or settles and the ball eventually becomes foul?