What word does this rebus represent?

meta meta
meta meta

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

I am quite hot but become too cold if you remove the first two letters. What am I?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Solve below rebus puzzle?

Solve the following series:
AZ, GT, MN, __, YB