scoring question

I have some situation questions on scoring high school level ball. I would like to get others’ opinions on how these should be scored

1. Grounder directly to third--not a rocket but not slow roller. Third baseman missed the ball and SS picked it up, but not in time so the runner reached safely. Is this an error on 3B or a hit?

2. Pitcher's pickoff throw went over first baseman's head, resulting in 2-base advance by the runner (the runner eventually scored on a double-steal the left-handed pitcher didn’t see). Is it a throwing error on the pitcher that allowed the runner to advance (scoring the "as if" inning, the runner would have been stranded)

3. Hard hit come-backer to the pitcher that was a routine 1-5-3 FC/double play situation. Pitcher got the ball to third and the third baseman fired to first. The throw from third to first was in plenty of time but drew the first baseman off the bag, resulting in the runner reaching safely. Is this an error or a FC? I heard an argument the DP is never assumed so it should be scored as FC

How are these scored? Are they errors?


thanks