Missed base appeals

[Dakota]

Partially stolen from the NFHS board, but turned into a more general (and interenting, I think) question.

R1 on first base. B2 hits long high fly ball to center. R1 leaves first base before ball is touched. Ball is caught. R1 advances to between 2B and 3B. 3B coach tells R1 to get back on first base. R1 reaches 1B before the ball, which was thrown to F3 on an attempted live ball appeal. With R1 standing on first base, defense requests and is granted TIME. List all appeals could be successfully made by the defense in these situations:

a) R1 misses 2B on the advance but touches on the return
b) R1 misses 2B in both directions
c) R1 touches 2B on the advance but misses on the return