Logic Riddles

Question: Can you finish this pattern? j, f, m, a, m, j, j, a, s, o, n, _?

Question: John got trapped in a cage. His parent are going to be beheaded. And his girlfriend is next. Who will he save first?

Question: How do you destroy a bully?

Question: If Paul was born on September 17, 1948, then what year is Paul's birthday?

Question: It is able, but not capable.
It can stop, but not go.
It is dead, but not yet perished.
It's a ghost, but not paranormal.

Is it high, or is it low?