NFHS:

Play 1: Charge
Play 2: No call
Play 3: Can't tell from this angle, not a block due to RA though.

Note on play 3: The defender established LGP outside the arc, but when the defenders foot came down it looks like it clipped the line. That's probably what the lead saw.

Question on play 1: if there is a travel, isn't this Trails call to make? I don't see how the Lead could have located the pivot foot while refereeing the defense.