Another Obstruction Question(s).

[3afan]

depends ...

on all 3 the runner cannot be put out between 1st & 2nd;
on all 3 its a dead ball when the obstructed runner is put out;
then you put the runner where you think she would have made it had the obstruction not occurred ...
in #1 that could be 1st or 2nd
in #2 it could be 1st 2nd or 3rd
in #3 it could be any!

so its not a straight "runner get awarded this base" answer ....